Hello I would like to clean knuckles by removing old graphite . I read in = the Reblitz the way to clean is to use a solution of eight parts naphtha = to one part mineral oil in a hypo-oiler. Is this technique still used ?=20 Thanks=20 Jack Houweling Jack, Forget the Mineral Oil!!!!!!!! Just use Naptha. You can also use Perk, (a dry cleaning solution), or "Renuzit", (another dry cleaning solvent/solution). Lubricate with "micro fine Teflon. IMO, Graphite has little or no use in pianos. It's olde technology that has caused more problems than it solved! Best Regards, Joe Garrett, RPT, (Oregon) Captain, Tool Police Squares Are I
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