Thanks Bill. (I just had a similar goop clean-up when my foam brush accidently touched some 3M5200 and made interesting birdseye patterns over the remaining surfaces.)

: In fact, it is important to let one coat of varnish dry completely before
: applying the next. Epoxy is catalyzed, and will react and cure given
: sufficient time and temp. But varnish relies upon air for the solvent to
: evaporate and to create chemical bonds in the film. If you apply a second
: coat too soon, the first coat will be deprived of its air supply and will
: never harden. The first coat is slowest, because epoxy can inhibit the
: varnish hardening. (This is not entirely a theoretical argument--I had to
: scrape off a gummy mess when I got impatient.)