The one thing to watch out for is that most gun cleaners are designed to remove powder residue AND OTHER METALS from steel, so they can be really bad news on some metals. Some of the most benign gun cleaners (eg. Hoppes) will strip nickel plating right off the gun if you give them some time.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8