From the LCSCA FAQs
To clean corrosion from the engraving, get some solid copper wire, like that used for household wiring (Romex) of 14~18 gauge. Strip the insulation off of one strand or just use the ground wire, cut it at a long angle with a pair of diagonal cutters. Use the fresh cut end as your 'pick' or tool along with some Kleen Bore Formula 3 or Ballistol to remove the rust. If it gets worn too smooth or rounded, just nip a small increment from its end to 'resharpen'. The Formula 3 will penetrate wonderfully and loosen the rust as well as prevent future rusting, and the copper 'tool' will not scratch a thing nor harm the engraving. It will be tedious work, but you should only need do it once. Do not be afraid to bear down or be aggressive with the wire's end, you cannot hurt anything, metal wise. You could put a gouge in the wood though if you slip, so pay attention. Use a piece of wire long enough to be comfortable held in your hand and bend the last 1/2 " 90 degrees or down for the working end if it makes it easier for you to use it that way. Dr. Bill likes to use a brass toothbrush with Ballistol.
Last edited by revdocdrew; 12/23/07 09:40 AM.