I successfully used destop or other types of drain cleaners for anodising removal.
Apply on the part you which to desanodize (or if it is a small, removable part, simply let it soak in).
Don't leave it alone, as it can eat the alloy. Usually, it takes about 10 minutes to strip the anodisation.
Then rinse abondantly.
I think I'd prefer to just sand rather than play with chemicals. To be honest I'm more likely to have a go at stuff with a black permanent marker while it's in place rather than take bits off and strip them. Once I find a smaller chainring that red ring (ouch) will be gone too anyway.
I successfully used destop or other types of drain cleaners for anodising removal.
Apply on the part you which to desanodize (or if it is a small, removable part, simply let it soak in).
Don't leave it alone, as it can eat the alloy. Usually, it takes about 10 minutes to strip the anodisation.
Then rinse abondantly.