Brasso and even semichrome are an abrasive. They can remove plating so be aware. Here is the problem with rubbing, buffing and wax compounds meant for cars: The chemicals do not play nice with vintage materials. No we do not generally use vintage materials in the pens that most of us make. I do use ceboplast when I can get it, I use celluloid with some segmenting, I use Ebonite and I have even used old Sheaffer rod. We had looked into a 5 part polishing system that we thought about offering. We sent samples and MSDS to prominent vintage pen people. This was a product that was designed for Mercedes coming out of the factory. Everybody said this stuff will hurt your pens. Everyone has a preference, I loved the new 5 part system but I could not in good conscience offer something that would have a potential to react chemically.