Hello Doug:
I just got a 1906 eagle and cleaned the grips. I used Art Buchanan's method. The link is
http://www.lugerforum.com/gripclean.html . I did find the grips have swollen a bit and do not fit right now. However, it seems that this is normal and that they will return to normal in a few days. Has anyone seen this swelling problem?
The stripper will not hurt them. I soaked mine for about 8 hours and wish I had gone 24 hours.
Good luck