[super]

Hello together,
has somebody good experience in how to clean sand casted and unpainted alloy rims best?
I have these pretty nice FIA wheels from Bob Lacey since many years on my car and meanwhile they look not as good as they were. Especially the oxide spots I have on them don't look very nice. Have you guys a hint how to get them looking like almost new?
If tried to clean the sand casted surface with oxalic acid which worked well, but the probem is that the machined areas will become dull and matte when they get in contact with the oxalic acid. Protecting / Covering these machined surfaces with tape will also not work perfectly.
Have you got better ideas?
Werner