Help! I put varnish on top of polyurethane

SlushmonkieAugust 29, 2011

I'm finishing a staircase and I goofed. The trim has been stained and I applied one coat of Varthane satin oil based floor polyurethane. The next day I goofed, and I applied a coat of Pratt and Lambert gloss varnish. What do I do? Sand off the varnish? Put a coat of polyurethane on top of the varnish? Thanks for your help.

Thank you for reporting this comment. Undo
brickeyee

Let it sure completely and then decide.

It can take a week or longer.

    Bookmark   August 29, 2011 at 10:12AM
Thank you for reporting this comment. Undo
RRM1

Don't panic, polyurethane finish is also a varnish. The beauty of varnish is that it should have more than one coat anyway. I'm not familiar with the P&L varnish. Is it thinned with turps or paint thinner? Varnish should be sanded lightly between coats any way. Anything finer than 150 will be OK, I use P-350 between varnish coats. Varnish is just resin dissolved in oil. Poly is just a synthetic resin, I don't know which resin P&L uses. It's probably on the label. The only question is do you prefer gloss, semi-, or matte? Just let each coat get hard before re-coating. I give mine 4-10 days. But I use "old-timey" varnishes. read label

    Bookmark   September 14, 2011 at 10:23PM
Thank you for reporting this comment. Undo
sombreuil_mongrel

Old Pratt & Lambert oil varnish was good stuff; I used a lot of it in the 80's, and their "Tonetic Wood Stains" too! Whatever happened in the ensuing years (formula changes) I don't know. If the poly had some degree of sanding prep, or was very recent it will probably be fine. If the poly was old and hard and had no sanding at all you could get peeling in the next few decades. Oil varnish sticks pretty well to just about anything. It will be as long as a year before the new varnish is dry enough to begin to crawl or peel.
Casey

    Bookmark   September 15, 2011 at 8:32AM
Sign Up to comment
More Discussions
Gel stain on stair treads and handrail?
I have read many of the inspirational posts in the...
amt782
Maple floor, pine trim oak cabinets
Help please! We just sanded our maple floors and are...
JenG92
Refinishing oak furniture
I fell in love with a very large (11 feet long) piece...
kjreif
Walnut Veneer Issues
Hi, I'd so greatly appreciate your help in identifying...
RChicago
species of window sill/molding?
I think this is my favorite window pic. Any idea what...
aptosca
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™