So a friend of mine had a Pentax K1000 with a jammed shutter/advance lever I was able to fix thanks to the help of the below thread(post #6 in particular):

Amazing help and knowledge here as usual... but my question is, should I follow up this repair with any light lubricating or anything else?

I'm pretty sure my friend acquired this body already jammed up, and I could see no apparent cause of the problem, but I'd love to keep this body functional for at least a few more rolls... or longer! This body definitely could use some new light seals and mirror bumper foam, but the bumper isn't quite as bad as I have seen before and does not seem to affect the mirror's return... at least not yet.

Any tips and comments are greatly appreciated as always!