I was happy enough to catch a Gillette Double Ring in the wild. Some have proposed to remove the black patina with the aluminium soda trick. I tried this trick with a Pomco razor which had a crack in the handle before. The trick removed the black patina of the Pomco but the hot water caused too much stress on the metal so that the crack became larger...
So is there any other trick to remove the black patina without hot water... Don't want to risk any damage.
Thanks,
Sami