what are the right temperatures for applying polyurethane paint to any surface? How achieve high gloss?

Answer 1

Is it a water-based or oil-based polyurethane? That will determine the temps. Oils can be used in much lower temperatures and higher humidity than latexes, but they're more of a pain to work with and yellow significantly over time. You don't want to apply latexes in temperatures under about 45 degrees F. But you also don't want to apply latexes when it's too hot, either. If it dries too quickly, you'll have adhesion problems.

If you want a high gloss, buy a the coating in a high gloss sheen. Gloss of a coating is mainly determined by how small the solids particles are ground. If your preferred product isn't availbable is a full gloss, you can increase the sheen of your semi-gloss by simply applying more than the recommended two coats.

Answer 2

Anything above 80 f. Actually the warmer the better. Mix it, if using a sprayer for the best results, as stated on can to go through the spray process. Spray on first coat very thin and wait for a few minutes for it to get tacky. That is when you do the second coat a little thicker but still not too thick. Wait for it to dry a bit and get tacky and do another coat, all in all about 4 to 6 coats. The last coat you want to put on a bit thicker but watch that you don't get so much it runs. That should leave a high gloss shine when it dries and a very nice coat. Before you start painting you need to be sure to get a tack cloth and get all the dust particles off as if you don't, they will show up on the finished product.

Answer 3

the best temp is 77 degrees Fahrenheit and 50 percent relative humidity. the best way i have found to get it really glossy is to buy a foam roller from like lowes or home depot. there like four inches long and about an inch in diamiter. they roll it on really nicely. then after 4-6 hours sand with 220 grit sand paper and apply more. the more times you do it the glossier it gets. twice usually dose it. it also helps that after you roll it on wait like 20 minutes and then roll it again with the roller not putting more polyurethane on it and it will help to remove the bubbles.... remember never to shake the can to mix it use a stick.