I tried cold bluing an entire handgun, and didn't like the result at all (except on the small items like screws), so I decided to remove the bluing and start over with a slow rust-blue. I washed off the firearm with hot soapy water, then used Birchwood Casey Blue and Rust Remover, then Evaporust, and then naval jelly, then sanded down everywhere I could get to, but certain areas of certain parts where I can't get sandpaper onto well still have 100% bluing. What's going on? I know that cold blue is actually a silicon coating. Does that make it immune to all of those rust and blue removers? Is there some other chemical I need to use?
