How do carb restorers clean the outside of the carb?

AdamR said

I guess it depends on the type of carb you are restoring. Holleys and Edlebrocks are plated so they likely blast them or strip them with something harsh then re-plate them. Factory

Carters I dont believe are plated. I cleaned a Thermoquad with wheel acid which worked well.

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Thanks Adam,
I think early AFB's were magnesium although not for sure. The restorers don't reveal their secrets (and I don't blame them I guess). There should be an answer out there somewhere. If an ultrasonic cleaner is what they use I would buy one for my own use and sell the service for others who want to restore theirs. Mike