Corrosion

[Heinz]

I am not a Luger expert but I have a lot of blackpowder experience which is extremely corrosive. First very gently remove the active rust. A rubber eraser is sometimes effective, very fine 0000 steel wool used slowly and gently so as not to damage surrounding areas. Next I clean the area with very light oil, like 3 in 1 or my personal favorite "mouse milk" an aviation product. Then wipe off all of the cleaner oil. Do it agian a couple of times. Follow up with a protective coating. WD40 is not a protective coating. I like RIG gun grease the best. Some others on the list may be able to comment on long term effects under the grips. I havee not seen a problem on some longrifle stocks with over 30 years of this treatment. But it is a lot more wood to dissapate the coating than Luger grips.