Keep us posted on clean-up. From what I've read, SKS bolt body retaining pins come in two varieties: easy to remove and atomically bonded. My 59/66 definitely fell in the latter category. No amount of soaking, heat and vise application worked. Brute force and tyranny of will won out, though. Good luck.
Came out very easily. Punch with a rubber mallet got it out in no time. Pressed it back in with a felt-padded vise. bolt body and all components are 100% cosmo-free at this point. Heading back home with a painter's heat gun to melt away more cosmoline today. Trying to get it in firing shape by EOD so I can hit up Creesap tomorrow.