In addition to shallow engraving, you need to really check out the integrity of the tone holes. Although photos may not show all issues in that department.I've came across a The Martin bari. the owner said he had his tech removed the lacquer on the horn. I'm not a part of the religion of original lacquer but I know the effects of a bad buffing job. What are some of the indicators of a bad delacquer job?
Some photos of the horn the seller sent me
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So a "de-re-de-lacquered" sax. I got it.
I think that is probably subjective. I think many people a brand new coat over pits and scratches is not so good, given the point of a relacquer is partly (or mostly) for aesthetic reasons.. So what if a few pits and scratches get cleaned and coated over rather than completely removed?
I have an even easier procedure. I do nothing whatsoever. If the finish comes off, and the exposed brass turns, I leave it. I guess in theory the unprotected brass will corrode through faster than where the coating remains, but given that it probably means the horn will last only 500 years instead of 550, it's not going to be a concern of mine....I used to strip the remains of old/original lacquers and hand-polish the brass, but no more. Now I leave any existing lacquer, no matter how spotty, and simply treat the exposed brass with 'Calcium, Lime, Rust' (CLR), which removes tarnish from the brass and leaves it a nice gold matte finish that contrasts beautifully with the remaining lacquer...