[Herb]

I think that is a call you have to make. I personally do not think that it will hurt the value, others think that it will destroy some of the 'history' of the Luger. I have had good results by just taking them to the sink and using hot water and 409, or something similar, and a stiff tooth brush and scrubbing them real good works great. If they are loose fitting I have also soaked them in hot water in a bowl, holding them down with a cup for a couple of hours. Eventually they will dry out again and the fit will become loose as it was before. If they get a 'greyish' color after they are completely dry a little linseed oil scrubbed in with that tooth brush brings back the color. Lets see what some of the other guys say, my method may seem radical to some but it works.