Originally Posted by Beausoleil
That's most probably the root of the problem - it's too hot. The top layer of the varnish
is drying too quickly, and the volatiles in the underlying wet varnish
have no place to go, ergo bubbles. Try applying a couple of coats very early in the morning. Of course, you'll have to do it when the temp is still above the dew point...
Ah but 95 is the temp outside. I'm doing the varnish work in the house (not making me popular with the wife) and keeping the work pieces relatively cool, more or less 80 F.