I have a 21 Glock & 357 S&W I purchased them both new this year. I have shot about 800 rounds are less in the Glock & 200 in S&W I always clean them both after target practicing from the range. When I am cleaning them should I use strictly patches with no.9 cleaner & should I use the brass barrel wire brush in the barrel each time I clean. I was thinking all my ammo is brass in both guns I may be doing damage to them using these brushes. I am a newbie on the cleaning part I would appreciate any help. One more thing I am noticing the blue seems to be wearing off on the outside of the Glock I guess it rubbing on the recoil will Glock warrantee this are is this just normal wear. Thanks