Hi folks, been lurking around for some time but haven't posted. Anyhow I have a question. I am sanding the bridge plate and saddles on my 2012 Squier Standard Tele to remove the shiny / satin chrome look. Plan to do so for the control plate as well. I am using sandpaper and after getting through the chrome I hit a very thin layer of copper, which I understand is common. Below the copper I find a whiter metal, probably the base metal of the saddle. My question is, does anyone know what this metal is?