[marxjunk]

i use deep creep a bunch have a case sitting around...and ive used it for years...and i dont think it will brighten up your stuff..if it sits long enough, it will turn dark on the surface.

id look for something with a mild, very mild acid to clean it, then coat the stuff with cosmoline...you can use an acid brush put it where ya need it, and wipe it off with a rag later

ive used it and it it sounds like what you need