I wondered if 320 grit might have a too polished surface, but it seems to be progressing slooooowly now. My shop is about 60 degrees and 45 % rH, warmer and I assume more humid inside the tent, but not sure how much so. I will let it muddle along a coat a day for a couple days and see how it goes. Thanks to all for the replies.
This is my first build, well two builds, working on the .45 rifle and a .54 pistol, both flintlocks. I have learned that the fine details of inletting are not my strong suit, but coming along.