Woodworking Beta

Questions tagged [polyurethane]

Ask Question

Polyurethane is a synthetic resin used in some modern finishes.

69 questions
Newest
Active
Bountied
Unanswered
Filter by
Sorted by
Tagged with
1
vote
0answers
37 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 ...
0
votes
2answers
45 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 ...
1
vote
1answer
58 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'...
2
votes
1answer
65 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 ...
-1
votes
1answer
97 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?
0
votes
2answers
52 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?
0
votes
3answers
43 views

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 ...
0
votes
0answers
54 views

Water based poly over oil stain

I saw a post that actually discussed this topic, but saw it a bit too late. It basically said that it's fine if you let the oil stain fully cure before applying the water based poly. However, I ...
0
votes
0answers
33 views

Polyurethane and white splotches

I applied a polyurethane stain to an oak piece and these white splotches and this white splatter are showing up all over! How to fix this?
0
votes
2answers
108 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 ...
0
votes
1answer
267 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 ...
1
vote
1answer
77 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 ...
5
votes
1answer
67 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 ...
4
votes
1answer
64 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 ...
4
votes
1answer
62 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 ...
1
vote
0answers
54 views

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 ...
2
votes
1answer
48 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 ...
2
votes
1answer
3k views

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

I'm finishing my first woodworking project ā€” 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 ...
1
vote
0answers
21 views

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 ...
2
votes
1answer
346 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 ...
6
votes
1answer
301 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 ...
2
votes
1answer
826 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 ...
1
vote
0answers
39 views

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 ...
1
vote
1answer
44 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 ...
1
vote
1answer
154 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....
2
votes
2answers
1k views

A beginner's question about sanding, stain, and polyurethane for a SMOOTH finish

I'm doing to hobby pieces using 3/4" pine ply. On my faces, I've sanded with 80, then 120, then finish with 220 using random orbit sander. To the touch, it's very very smooth. I'll give it a good ...
1
vote
0answers
37 views

Spreading water-based Varathane that is 3 times thicker

I used water-based 3X Varathane on a table top I am refinishing. It is very difficult to spread because it is so thick. It is supposed to be "self-leveling". I cannot brush it on evenly because it ...
2
votes
1answer
4k 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 ...
4
votes
1answer
670 views

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? ...
5
votes
1answer
59 views

Applying finish over furniture repair wax

I have a panel made from recycled lumber - there are a number of 10mm holes from some sort of fixtures in the woods previous life. These are not nail holes, but clean drilled out holes. I'm not ...
1
vote
1answer
3k views

Can I put a clear polyeurethane coat on top of teak oil?

I have an outdoor bench that came with instructions to coat it with teak oil once a year. I've done the teak oil one year so far. If I put on another coat of teak oil this year, do you think I can ...
1
vote
1answer
813 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 ...
1
vote
2answers
112 views

Top coat poly makes other sides rough

We're restoring some old furniture - sofas with a lot of carving, whole wood book shelves, et al. We've stripped the old varnish and are redoing the job with poly. We did 2 coats of PU sealer and 2 ...
1
vote
1answer
105 views

Moisture Blushing or Inadequately Mixed Satin Wipe-On Poly?

In the final step of finishing my speakers I was putting satin wipe-on poly over my danish oil. The danish oil sat for 6 days on my walnut paperbacked veneer in my basement with a dehumidifier going. ...
1
vote
2answers
327 views

Polyurethane a box (vertical sides)

I was originally going to use spray lacquer for my speaker cabinets which are essentially large cubes. However, I've switched to brush on Poly. Is it possible for me to apply the poly on the ...
0
votes
0answers
67 views

Staining veneer in humid weather

I am working in my garage in Wisconsin in August so needless to say itā€™s super muggy/humid. Iā€™ve veneered my speaker cabinet and Iā€™m getting ready to stain. Should I bring in the cabinets and put ...
0
votes
1answer
80 views

Spray on Lacquer for Vertical Surface

I have a rectangular speaker cabinet (basically a box). Can I use spray lacquer and spray all sides at once? Otherwise I have to account for a lot of overspray.
2
votes
0answers
72 views

Sun damaged polyurethane-finished dining table

So I have this Italian made marquetry dining table which has a polyurethane finish. I acquired this as a used item and I noticed after purchase that in the light I can see streaked areas where it has ...
1
vote
1answer
2k views

Can I use linseed oil and water-based polyurethane on opposing sides of a 1/2" board?

I know that linseed oil and water-based polyurethane won't work together. But I have 1/2" poplar paneling that I am installing in my van and am hoping to get the best of both synthetic and natural ...
5
votes
2answers
9k views

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 ...
1
vote
0answers
477 views

Pore/Grain Filler Over Danish Oil

I have two slabs: redwood some kind of hard wood that I think resembles a red gum wood I have coated them in Danish Oil and this coating has been allowed to dry for over 10 days. My long term goal ...
1
vote
0answers
561 views

What finish should I use on wooden jewellery?

So, I'm carving a wooden pendant for my girlfriend. I want the finish to be satin. However, since she plans on wearing it all the time, I want it to be water resistant. I do not want the wood to get ...
1
vote
1answer
1k views

Should I use a conditioner on maple before applying tung oil finish or polyurethane?

I am getting to the end stages of building a desk out of maple. Should I use a wood conditioner on my maple wood before applying tung oil finish or polyurethane? I have tried a bit of both on a test ...
1
vote
2answers
3k views

Using Tung Oil and Polyurethane on Maple?

I am getting close to completing a desk I am building. This has been a very ambitious project for me as this is the first time I have ever built any furniture (shelving not counted) and this is a ...
3
votes
2answers
592 views

How are bubbles avoided when brushing on Polyurethane?

I have used polyurethane a few times. Each time I've tried to be more careful about creating bubbles, but the finish was still riddled with bubbles. Just the act of dipping the brush in the can and ...
0
votes
1answer
872 views

When working with polyurethane glue, how long does one have to clamp the components?

I am going to be building some shutters for one of our windows and because of its location, planned on using polyurethane glue, specifically Dap Polyurethane Construction Adhesive. Each shutter will ...
2
votes
1answer
849 views

Rough polyurethane job.

I applied poly after staining what I thought was a smooth surface pine board. Rough when first coat dried. Sanded it lightly and is fairly smooth. I want to apply another coat but dust is sticking to ...
2
votes
1answer
2k views

Minwax poly stain still sticky

I'm new to this forum and new to woodworking as well...I'm renovating my daughter's bathroom and she wanted the cabinets stained darker. I thought that would be pretty simple (šŸ˜³šŸ˜©) and inexpensive so ...
4
votes
2answers
3k views

Do I need to add natural stain before applying polyurethane for natural finish?

I have an unfinished desk and want to keep the natural color of the wood but I want to protect it with a clear polyurethane finish. I am wondering if I need to (or is it preferable to) add a clear or ...
4
votes
1answer
3k views

Didn't let wood dry between coats of stain & poly. How to correct?

I attempted my first ever woodworking project this weekend and thought it was going smoothly until I realized I was supposed to let the minwax oil based stain dry for 4-6 hours between coats. I had ...

1
2