Tumbling tarnish resistant wire?

I like to 'road test' jewellery before making the finished item available for sale, and so have made a bracelet with lampwork beads and 'anti tarnish' copper wire, prior to using sterling silver.

I would like to work harden it further, but wonder if the anti-tarnish coating on the wire is likely to get removed by my shot? I don't know how the coating is likely to have been applied, and how robust it might be.

Thanks in advance.

First of all, hardening in a tumbler is a fallacy repeated over and over. Tumbling does little for hardening metal, except for compacting the very surface by burnishing.

To harden metal, it needs to be distorted by twisting or hammering (work hardening), or by heating in a kiln or oven (precipitation hardening)

If your copper has a coating, it will most likely be removed, or damaged by tumbling. When you go on to use silver, I can highly recommend Argentium for tarnish resistance. Dennis.