I painted my entry door (heavy mahogany) 12 years ago with 6 layers of Behr
spar varnish. Now its time to give it a new coat.
I have quite a bit of the varnish left over from 12 years ago. The can was
well sealed and it is still has the same consistency. The stuff is
expensive. Can I use the old stuff or should I bite the bullet and buy a new
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