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Thanx pl. No the B&C didn't hurt the gold. I think Aqua Regia is the only chemical that can hurt gold.
Aqua regia - Wikipedia, the free encyclopedia
Normally I'd mask off the rest of the work...

This is an example of what happens if a razor is stored a while in damp condition. Even the brass name plate was corroded :(
Before pics are courtesy of the owner as I almost always neglect that...