So just got the csa 58 sporter and all CTC had was corrosive. Now I realize if it gets a 1000 rounds and sits a month we have a different animal. That being said for the frequent flyer as I am (AKA anal about gun cleaning) so doing it after 100 rounds. Why would a basic field stripping, then spraying surfaces with brake cleaner then WD not work? I guee what I'm saying is if You spray the brake cleaner till the parts shine and the stream coming off is clear to me that's that. Please comment. BTW.....GUYS BUY ONE OF THESE. I'm a hater of black ,but. I think this thing fires skittles