I find shooting surplus to be something that people dramatically make a big deal out of. I've put hundreds of rounds of old 70's corrosive 7.62x54R through my Mosin Nagant and have yet to find a trace of rust or anything of the sort. I always clean my firearms (corrosive or not) after shooting and I never put boiling water, Windex (most Windex doesn't even have ammonia in it anymore like most say is the reason they use it), soap, or urine (I've heard the Russians did this, but I doubt it lol). I use good ol' Hoppes 9. I run several patches until the fowling is very light (you'd be hard pressed to clean a Mosin barrel spotless) alternating between one wet patch, one dry, etc. and then a final patch with light Hoppes oil. I clean the bolt, especially the bolt face very well, again with Hoppes 9 and the end of the barrel.
As I said, I've never had an issue. Also, FWIW, I've read that the 7.62x39 Yugo corrosive ammo is only lightly corrosive, not nearly as bad as the 7.62x54R. Bottom line, just clean your gun with a water based solvent (like Hoppes 9) and you'll be fine.