I work nights and couldnt sleep last night. I had some very rusty silencers in the garage but nothing to clean them up with. I did have some aluminum foil in the kitchen, and some coke zero. I crunched up the foil and soaked it in coke, with a little elbow grease the silncers looked like new. I heard about it awhile back someone on this forum...I didnt think it would do much...it works...better than anything else ive used.