by S. Heisley » Sat Nov 13, 2010 9:10 pm
Thanks, Paul and Scott.
Doug:
Minwax recommends lightly sanding with 220 grit sandpaper between coats if you're applying it to wood; however, sanding in this application would definitely damage the paper, even with a fine grit like 220. The various paper-laying instructions that I have read do not suggest sanding either; but, they do mandate that each of the 4 to 6 coats of polyurethane be put on in rapid succession, as soon as the previous coating is dry. Once all coats are on, you do not disturb the surface in any way for at least 24 to 72 hours, longer being better. Minwax instructs not to use throw rugs on it or walk on it for 7 days. From that, I am assuming that a full cure takes 7 days and, chemical bonding can take place during that time. I have known people who mopped coats of polyurethane over vinyl kitchen flooring with no sanding and they have had no problems with that application.
Ageless:
I collected the leaves but elected to use hand-made copies of the actual leaves for a couple reasons: 1) any dampness still in the leaves could be problematic once encased in polyurethane and, most importantly, 2) since mine is a walked-on surface, the weight of people might eventually pulverize actual leaves. Your leaves will look great on a tabletop!