I had my Chinese SKS in my car over the weekend as my backup for Appleseed. Didn't need it so it stayed in its sock the whole time.
When I pulled it out of the sock this afternoon (I had brought it back into the house Sat & Sun evening) to put it away, this is what the stock looked like:
The finish had bubbled up on almost the whole thing. Unless someone has a better idea, I'm just going to lightly sand it down to smooth it out since I'm not going to refinish the whole thing anytime soon.
Update: Thank you all for the suggestions. I went with the quick and dirty Linseed Oil/Quad'0' smoothing which seems to have worked fairly well. It will need a full refinishing later so that will be a project for another weekend.