Plating preparation black Caterpillar bolts

[borgen]

Dear All,

For my bike i want to replace the corroded nuts and bolts with good quality Caterpillar bolts and nuts. (have lots of them available and i like the 12 point ones a lot))
I got a lot brand new but they have black oxide treatment and i want to cadmium plate them or chrome plate them. (no decision yet)
The question is: How do i prepare black bolts for plating, i got most of the chemicals but like to have advise on what is required to get the black off and get a clean steel surface for further preparation for plating.

Also how do i remove CAD plating in preparation for chrome or nickel plating.

Many thanks in advance.

Best regards,

Borgen

[jimcarry]

using any typ of compound black oxide will simply polish off