I know first hand the effects of long term exposure of sunlight to polyurethane finishes, so I don't need much advice there, but another question arises.
After application, it takes about 24 hours for the poly to "dry to the touch", but actually takes about 1-2 weeks to harden (or at least so it seems - I don't have a way to make any more scientific measurement of this.) It is during this period of 1 to 4 days after application that I am wondering if one might accelerate the hardening or "curing" of the finish by direct exposure to sunlight for a few hours each day. Of course, no exposure to moisture would be allowed.
Every time I have wondered, I didn't want to risk the project to try it out, so I was wondering if anyone else has any experience trying to accelerate the hardening either with sunlight or some other method?
TIA,