I sent my two thrift shop Leica C lenses, (previous thread), to Sherry Krauter to be CLA'd. She told me in an email that she could re-lacquer a lens surface for $5. I told her to go ahead and do this to any lens surface she thought needed it. Frankly, I've never heard of this service before and can find no reference to it on the Internet. Can anyone shed some light on this treatment?