Hey guys, I'm planning on refinishing a Makarov frame. I want it to be a little more resistant to rust and to look better, the finish is faded and just doesn't look as good as it used to. I want the gun to have a duo-tone look to it so I'm probably gonna refinish it in a matte silver/gray. Any suggestions on the best products to use are welcome. First things first though. I need to prepare the surface and I'm wondering what's the best kind of sandpaper to use? I don't want to risk taking any metal off it (kinda paranoid about that) thanks in advance.