I am going to take my PM outside to do the sanding before I apply the varnish.  Any concerns about exposing epoxied, but unfinished wood to elements?  I am going to cover with a heavy drop cloth when I am not working on it. And I live in Camarillio, CA - Ave daytime highs will be in the mid- 70s over next 10 days or so.  So excited to get close.