I recently replaced the Pick guard on my 1938 Gibson L-12. It was off-gassing so badly that when I changed the strings and left it in the case, the next day the strings felt corroded and unplayable. The tech who replaced the pick guard mentioned that it was still valuable and could be preserved. I’m in LA and he said there was someone at the Getty Center who did this work. I’m looking into it, but I’ve found nothing on the internet about reliable ways to arrest corrosion of celluloid. Any guitar techs have experience with this?
