Perfection Plus two part clear polyurethane
"varnish" is a tough, rather elastic coating and is working really well for me. Up to a point.
It comes in a one quart package, to be mixed 2:1 by volume. Part B, the "hardener" comes in a re-closeable can with a screw top. When coating small parts
, I often use small amounts and always re-close the containers promptly. However, the Part B goes off, turning solid in its container if I try to store it for three or four weeks while working on other projects.
Part B is only offered in combination with Part A. At $85-$105 per quart. I now have surplus Part A and no Part B; tough to face discarding the unused Part A.
Anybody know how to source more Part B alone? Anybody know how to store opened Part B without it going off? (I've tried other closed containers, storing it in the dark and "Bloxygen" air displacement
. None of these efforts had any discernible effect.
Is this an oxygen "cure"? A UV "cure"? A moisture "cure"? I can't find out what triggers the stuff to go off. The mfg. site offers no information on point.
I'd hate to give up a really good product because (a) it's really expensive to begin with, but - barely - worth it; and (b) it's much too expensive when half or even more of the quart is lost
and unusable because Part B can't be stored after opening.
Any help would be appreciated.