Questions tagged [polyurethane]

Polyurethane is a synthetic resin used in some modern finishes.

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255 views

Natural pine wood bed has strong chemical odor, why is this and how to stop it?

I threw out my old bed since it was falling apart and this is when it all went downhill. First I got a new bed (upholstered, unfisnished MDF board) that had such a strong odor, it invaded all the ...
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Getting a smooth finish with polyurethane varnish spray [Rust-Oleum, gloss] [duplicate]

I am trying to finish a desk I made out of C16 construction lumber and MDF (for the desktop). The bottom half of the desk has been painted and sanded and I am now wanting to spray a polyurethane ...
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2k views

How to fix polyurethane finish peeling off furniture

So I recently bought a piece of furniture which (based on my research) has a polyurethane finish. After it arrived I discovered it had scratches, which I believe is polyurethane flaking off (you can ...
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Is water-based polyurethane completely scratch resistant?

Just received a custom table finished with minwax water-based polyurethane. It's been about a week so I tested applying pressure with my fingernail, which did leave a small scratch if you look closely....
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84 views

Will faster drying interior polyurethane work over a layer of slow drying exterior poly

I am coating a pine mantlepiece with gloss polyurethane. I used interior/exterior poly for my 1st & second coats for protection from sun exposure. Because of the longer drying time 24/48 hours ...
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2answers
127 views

Is there any issue using a water based stain then oil based finish?

If there is no issue, what is the proper way to perform this? How long after staining should I wait? I’ve only found answers to the reverse problem. And not sure if it would be the same answer.
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1answer
48 views

Can resin or epoxy be poured over a poly finish?

I pulled the tile out of my dining table and replaced it with multiple wooden slats that I torched, sanded, then stained. The valleys in the grain are amazing and I left a smooth board in the center ...
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1answer
377 views

Water based poly finish over oil based stain is tacky

In my first attempt on a woodworking project, I am trying to spruce up a dresser made of raw pine wood. I stained it using Varathane oil stains. After it dried completely over a couple of days I ...
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1answer
386 views

Polycrylic getting sticky and peeling/wearing off

I coated a bare wood acacia table for a computer desk with Minwax polycrylic about 4 months ago and made sure it was dried the recommended 24 hours before regular use. 4 months later, I noticed the ...
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2answers
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Polyurethane clear coat is thickening to a jelly in the can!

I've been refinishing wood cabinet doors. I've sanded down to the bare wood, then applied a pre-stain. After 1 coat of stain I'm putting on 2-3 coats of polyurethane clear coat. I'm using mineral ...
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1answer
46 views

Drying time on line tongue and groove boards

I have staying and sealed the tongue and groove boards with 2 coats of poly. I need to restack them until the contractor comes to install them. How long should they dry before I do this?
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How significant is the yellowing from aging polyurethane?

It seems that at least half of the questions we get about finishing are along the lines of "I don't want any yellowing from my finish", or "I don't want any yellowing because of aging ...
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1answer
71 views

First time painting furniture - top coat, polyurethane yellowing?

I've built a small office desk and a shoe rack out of pine and now plan to paint both. The most used parts, i.e. table top of the desk and the shelves of the shoe rack are going to be black, the rest ...
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2answers
183 views

Polyurethane over Boiled Linseed Oil Timing? -- Butcher Block Tabletop

Short version If I'm using a few coats of boiled linseed oil (BLO) followed by a few coats of polyurethane, what should the timing schedule be? For my specific use case, this will be a large butcher ...
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33 views

Oil-based polyurethane became cloudy after sanding and wiping with moist cloth [duplicate]

I applied a thick coat of oil poly. Once dry, it looked clear in color. However, it was very rough and uneven, so I sanded heavily. After hours of sanding, I wiped the sawdust off with a moist cloth. ...
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Will my tacky polyurethane eventually cure when average air temperature rises?

So, for lack of a proper shop, I was applying a first coat of undiluted Varathane Ultimate Polyurethane (oil based) to a plywood box using my dining room table under a plastic drop cloth as a work ...
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1answer
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Is this mask sufficient to filter polyurethane fumes?

I'm learning how to apply polyurethane and am very bothered by the strong fumes. Is this mask from Harbor Freight sufficient protection for health purposes and will it help to filter out the smell? ...
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1answer
143 views

Number of polyurethane coats before I can polish?

My first post on WoodWorking Stack Exchange so please forgive me in advance if my question has been answered before. I am new to woodworking and have read a lot of information regarding working with ...
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How to coat and finish a fresh cut end grain cookie stop it from drying/cracking? [duplicate]

First timer here (to forum and woodworking). I have two, 2" thick tree slices ("cookies") that have a diameter of around 20". I'm trying to turn them into end tables as a gift for ...
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2answers
11k views

How to fill in holes and gaps after applying polyurethane

I'm finishing a very rough piece of scrap wood for use as a tabletop and to practice applying polyurethane. I've since found that the holes and gaps aren't really "filled" by the material and that I ...
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0answers
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Why do MDS for polyurethane finishes show such a wide range of solvents? What are we really getting?

I like to thin my polyurethane finish with mineral spirits as an alternative to buying a wipe on poly - but when I started to look at several of the easily available options for Clear Gloss, like ...
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1answer
64 views

Sealant recommendation for pen-holding box

I am about to start assembling a box to stow away items that otherwise overrun a desk. The box arrives in small pieces. Before assembling, I'd like to apply some sealant so that it stays clean for ...
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1answer
163 views

After 4 coats of light wipe on poly my counter looks spotty

I have butcher block counter tops that I just bought. Unfinished birch to be exact. I stained the block then let sit for 48hr. After that, I put 4 coats of wipe on poly on. It looks and feels fine ...
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32 views

Polyurethane on top of an uneven texture

I'm building a headphone amp - I've opted to go for a patchy paint job on top because I like the pattern it introduces. Having said that, the paint is uneven as a result. If I kept this as is and ...
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Why does my workpiece become rough again after applying polyurethane varnish when it wasn't before?

I am in the process of applying polyurethane varnish to a finished workpiece and have been sanding between coats as advised by the manufacturer instructions. I initially wondered why this was ...
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2answers
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How many coats of polyurethane?

I am finishing oak trim (casing, baseboards, and quarter round). I am using Minwax fast drying polyurethane clear satin. The instructions call for 2 or 3 coats. If I ensure that the 1st and 2nd ...
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875 views

Proper way to dilute water based oil-modified polyurethane?

What is the proper way to dilute water based oil-modified polyurethane? I know for oil based poly, to use mineral spirits. Water based poly, use water. I couldn't find any details on how to dilute ...
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1answer
92 views

Best waterproofing method for bathroom project?

I'm somewhat of a beginner woodworker and I'm looking at building a small caddy of sorts for my bathroom counter to hold my razor, razor blades, shaving brush, toothbrush, etc. because my bathroom isn'...
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216 views

Sanded lightly between coats of minwax. Applied second coat and you can see where I sanded. How can you fix this?

Refinishing a pine table. Applied one coat of minwax wipe on then sanded as told. Applied second coat and sanding marks still showing. Can it be fixed?
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1answer
2k views

Finishes over mineral oil

Over the past few days I have been refinishing a cedar chest. I used stripper and a razor blade to remove most of the old finish before starting to sand. I sanded it up to 600 grit. I was reading ...
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110 views

Should I use or exterior oil based polyurethane for wood trim in a bathroom?

I have stained all the wood trim in my bathroom. I am planning to coat it with an oil based polyurethane. Would exterior poly be preferable because it is exposed to moisture?
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3answers
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Sanding Poly coated veneer

I put new oak veneer on a table and applied two coat of polyurethane. It now looks as though I should have sanded down the veneer to a smoother surface. It's not terrible, but it the grain is sticking ...
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1answer
232 views

Best way to glue two finished surfaces

What would be the best way to glue two surfaces which have already been finished with Danish oil and then wipe-on poly? One surface would be the cut edge of ply, the other surface would be solid wood....
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2answers
233 views

Recommended finish for workbench vise

I made a small tabletop Moxon vise and after some research decided to finish it using a 3-part mix of equal parts polyurethane, boiled linseed oil, and mineral spirits. Sounds okay to me, but I'd like ...
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1answer
1k views

Water based oil modified polyurethane finish beading when applied over stain on pine

I applied Minwax Wood Finish penetrating stain to white pine cabinet. Wiped stain thoroughly, waited 60 hours before attempting to apply Minwax water based, oil-modified polyurethane, using synthetic ...
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1answer
706 views

Using PT lumber indoor if covered with polyurethane?

Earlier today, I posted a question about building a small table with pressure-treated wood. A few people chewed me out for using PT wood indoors, so I deleted it. So just now I called a lumber store ...
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1answer
79 views

Meat Grinder Table Design

I am considering building a table for a meat grinder out of wood and then covering it in something to make it last longer. The basic idea is that the grinder would sit on a higher section and then ...
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1answer
165 views

Veneering with construction adhesives (PL Premium, etc)

I have one curved staircase riser I need to veneer or otherwise match with hardwood floor. All the other risers are going to be done with thin plywood and clear coated (treads will be assembled from ...
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1answer
76 views

How do I finish-off pine wood after issues?

I'm trying to finish a pine dresser. Here are the steps I have taken so far: Sanded 1 layer pre-stain wood conditioner (Varathane) 2 layers of wood stain (Varathane Classic) 1 layer of water-based ...
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1answer
194 views

How to get an even sheen with wiping varnish?

I am making my own wiping varnish by following Bob Flexner's recommendation of mixing polyurethane varnish (in my case, Minwax semigloss) with odorless mineral spirits. Everything seems to be going ...
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0answers
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Strategy for coating a built table with polyurethane?

I built a simple table. I stained each piece before final gluing and construction. I am not sure how to polyurethane the table. I am concerned about both getting an even coat that doesn't run and ...
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1answer
134 views

Does water-based polyurethane affect paint color?

I recently painted a dresser. I originally painted it a darker gray than I wanted so after putting the initial two coats on I took the paint back to Home Depot and had them lighten the rest of the ...
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1answer
10k views

Can I use #0000 steel wool for final polish of water-based polyurethane?

I'm finishing my first woodworking project — a tabletop that I hope to mount on a sit/stand desk mechanism. I've stained and applied 4 coats of Varthane water-based polyurethane in matte finish. I ...
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1answer
1k views

Do I need to sand off old finish completely before applying polyurethane?

I want to add polyurethane to wood floors to protect them from wear. The floors were already finished and looked fine. I sanded one floor with 120 grit sandpaper, and now the finish looks patchy. I ...
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0answers
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How to smooth out final polyurethane coat? [duplicate]

first time posting here and first time doing any sort of woodworking. I purchased the Gerton table top from IKEA and it came pretty scratchy. So I sanded it with 120 grit sandpaper and applied 3 ...
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1answer
773 views

Should I use a router before or after my finish is done?

First time poster so forgive me if my question is worded poorly. I have a wood art piece that I'm coming close to finishing. I plan on routing out the back of the piece to lay in some LED lights to ...
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1answer
5k views

When can I sand water based polyurethane?

I've applied Water Based Varathane Ultimate Polyurethane to some desktops. I intend to apply 3 coats. The instructions say drying time is 2 hours. Can I sand the finish after 2 hours or do I have to ...
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1answer
51 views

Refinishing over different polyurethane

I have a lot of door and window trim that I finished with a satin polyurethane. I recently started a project to finish trim in another location in my house. I somehow managed to use a different satin ...
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0answers
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I'm looking for a good finish for goblets and shot glasses [duplicate]

So I have started turning some goblets and shot glasses, and I'm trying to find a good finish for them that can be nice and glossy, but doesn't need constant reapplication. I'm pretty sure that ...
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1answer
355 views

What is causing this poor refinishing result and how do I fix it?

I followed the procedure of stripping, sanding, staining and then polyurethaning the top of two antique, about 75 years, dressers. The one came out beautifully. The other has questionable results. ...