I usually disassemble wheels to clean the grease and dirt off of the spokes, hubs, rims, and nipples. They're brass and the nickel plating on them is thin and fragile, easily removed by abrasive polishing. I found an easy way to clean the nipples that leaves them looking almost new.
Start with this:
~2min in Tarn-X. If you want the plating removed completely, leave in for an hour or more:
I pour the Tarn-X back into the bottle, flush the glass with water, then out into the sun to dry.
The last bit of residue easily removed with a Fabulustre polishing cloth:
Start with this:
~2min in Tarn-X. If you want the plating removed completely, leave in for an hour or more:
I pour the Tarn-X back into the bottle, flush the glass with water, then out into the sun to dry.
The last bit of residue easily removed with a Fabulustre polishing cloth: