Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now

Questions tagged [polyurethane]

Polyurethane is a synthetic resin used in some modern finishes.

Filter by
Sorted by
Tagged with
-1
votes
0answers
39 views

Finish Baltic Birch plywood with water-based polyurethane finish

So, I'm in the process of making a cabinet/working surface to store my tools/work on. My cabinet will look something like the one in the picture below if all goes well :P Concerning the finish, this ...
1
vote
0answers
39 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
29 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
81 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 ...
1
vote
0answers
17 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
36 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
71 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
60 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
41 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
0answers
68 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
276 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
35 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
0answers
681 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
77 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
58 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
389 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
352 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
96 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
71 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
138 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
44 views

Staining veneer in humid weather

I am working in my garage in Wisconsin in August so needless to say it’s super muggy/humid. I’ve veneered my speaker cabinet and I’m getting ready to stain. Should I bring in the cabinets and put ...
0
votes
1answer
45 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
50 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
1k 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
3k views

Polyurethane clear coat is thickening to a jelly in the can!

I've been refinishing our 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
383 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
115 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
844 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
2k 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
476 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
658 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
508 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
1k 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 (😳😩) and inexpensive so ...
3
votes
2answers
1k 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
957 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 ...
2
votes
1answer
2k views

What can be done to correct wipe-on poly that is still tacky after 24 hours?

The project is an oak dining table top. The varnish had worn off in spots. After stripping a few spots that had been exposed for longer still had a gray, aged look. It is a veneer so I didn't want to ...
4
votes
2answers
4k views

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 ...
4
votes
2answers
14k views

Water-based polyurethane Vs. Oil-based polyurethane

What are the key differences between a water-based polyurethane and a oil-based polyurethane? How would one be better than the other? What lasts longer on wood, penetrates, Etc. When should there be ...
1
vote
2answers
55 views

Clean and protect cabinets and railing [closed]

Wanted to clean and protect the cabinets and railings in our house. They feel very dry to touch and ones in the bathroom look dirty. But first I want to understand what kind of wood was used for these....
4
votes
1answer
259 views

Best TOUGH clear finish for fragile wood-shaving flower?

I made a rose from Poplar planing scraps; the arranged, concentric, shavings are tissue-paper thin. I wanted to somehow seal and finish the flower so that it would have some degree of durability, ...
7
votes
1answer
330 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. ...
4
votes
1answer
96 views

polyurethane finish krinkles?

I've been having the hardest time with one little section of a table I am finishing. I am using Varathane oil based clear polyurethane. I've been spraying it on with a 20% turpentine / 80% varathane ...
2
votes
1answer
73 views

Waterproofing Wood With Left Over Polyurethane (Aesthetics irrelevant to project)

So I know the off-the-cuff answer is you cannot (or should not) use Indoor Rated Poly to weather proof wood as the sun's UV will discolor the wood and other issues visually. This wood though is being ...
2
votes
1answer
645 views

Blotchy Water based Poly

Got new unfinished dark walnut cabinets. Used water based poly after a thorough light sanding and cleaning. After two coats the cabinets look blotchy. What can i do? Thinking about sanding them down ...
1
vote
1answer
1k views

Removing oil-based polyurethane residue

I have been working with polyurethane often and I get some on my hands but mostly my brush. I try to wash it out right after I am done using it but it does not seem to work, even with simple soap. ...
10
votes
2answers
17k views

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 ...
3
votes
1answer
121 views

Is low-formaldehyde plywood important if the wood will be finished with polyurethane?

I'm willing to pay a premium for low-VOC materials to improve indoor air quality. Recently, I've been using PureBond plywood, which uses a soy-based adhesive instead of urea formaldehyde. This surely ...
1
vote
1answer
2k views

Can I salvage a paint brush with dried polyurethane on the bristles? [duplicate]

I bought a nice Wooster Pro nylon brush to use for applying water-based polyurethane to some projects. After the last application, I forgot to wash the brush and it has since dried and hardened. I can ...
2
votes
2answers
837 views

Polyurethane rub down problem!

I'm in the final stages of finishing an oak poker table. I have applied 3 coats of deep mahogany oil, which went on OK but didn't really soak in well after the first coat. Now I am applying 3-5 coats ...