Questions tagged [polyurethane]

Polyurethane is a synthetic resin used in some modern finishes.

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9
votes
3answers
36k views

How do I de-nib polyurethane after it dries but still maintain its finish?

Sometimes when I apply polyurethane, for whatever reason, it's not completely smooth. Maybe a brush mark here and there, or a couple little nibs, etc. The advice I see often is to sand the area ...
8
votes
5answers
388 views

I polyed my paintbrush then procrastination left me in a predicament

I was using a nice paintbrush with polyurethane and it seems that I set it down then forgot to clean it. I have since run into it and I have a shiny, relativity tough, paintbrush now. Needless to say ...
7
votes
1answer
2k views

What is the difference between wiping polyurethane and wiping varnish?

I make my own wiping polyurethane by thinning regular oil-based poly from home improvement stores with mineral spirits. According to Bob Flexner, the only difference between this and polyurethane-...
6
votes
1answer
982 views

Flat polyurethane finish for tabletop

To protect a reclaimed table top, could I use gloss poly as the first coat and then top it off with a flat poly? I've heard that gloss gives better protection, but I want a flat finish.
6
votes
2answers
13k 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 ...
4
votes
2answers
690 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 ...
2
votes
1answer
135 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
144 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
129 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.