I recently acquired a Mini Griptilian in 20CV through a trade. The trader said there was some paint spots on the blade and I had no issues with that. In his photos, it really did look like gray paint. After cleaning with toluene and MEK the paint would t come off. I had to use a brass brush and some scotch bright to expose the base metal. I posted photos of what looks like corrosion or some sort of chemical reaction that has eaten away some of the metal. Has anyone had any experience like this with 20CV?