I've got some Tele parts like bridge, ferrules, tuners, all the screws etc and have tried sealing those parts in a plastic container with a few cups of fuming muriatic (HCL) acid. The fumes from the acid definitely took the shine away from the nickel parts and discolored everything somewhat but that was over the course of a few days. The muriatic acid has a concentration of about 30 percent so it was plenty strong. The fumes had little to no effect, however, on the brass saddles and there isn't much rust to speak of on the screws etc. Also, the acid had no effect on the chrome covered control plate. Does anyone know of other ways to distress/age/and or relic nickel parts to create some rust and especially how do you get the chrome pieces to pit, like the kind of pitting you would see on an old chrome bumper? Yes, I've done a search here but want maybe some up to date info!! I've got some parts I purchased pre-reliced from a well known relic service (MJTelecaster) to base my comparison on and those purchased parts are probably 25% more aged looking than what I tested, they have more rust, discoloration etc, and the brass parts are discolored and aged also. tks for reading, any info would be appreciated!!