I’ve been asked to complete a small project. What I’m looking at is a large wooden ‘plug’ which is to act as lid on a large diameter pipe in a floor. The plug is made of two pieces of 3/4″ plywood, one 12″ in diam. and the second piece 10″ in diam. A design was drawn on the larger piece, done with a ‘Sharpie’ type pen. The whole thing was then given a coat of water-based Poly finish. Now for my question… can I apply a coating of regular ‘Spar Varnish’ over the existing finish as it will be in a location where it will get stepped on. Or… should I lightly sand and apply several more coats of poly finish?? Thanks SawdustSteve
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Replies
For maximum adhesion it's important to re-coat poly within the re-coat window since it cures so hard all you will have is a mechanical bond achieved by scuff sanding. Since it's a small piece with one coat I'd sand it back to wood and put several coats of poly on it per the schedule on the can. I spray Enduro waterborne poly and it powders between coats in 20 to 30 minutes so it's pretty easy to get as many coats as you want within the window.
John O'Connell - JKO Handcrafted Woodworking
Life is tough. It's tougher if you're stupid - John Wayne
Agree with ELCOHOLIC. NO since in going through the trouble to recoat when taking the single coat will ensure proper bonding.
Good Luck.
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