Nah. The stain is when its no longer silver nitrate. Because Silver nitrate is a soluble salt.. if its still in that form, all i have to do is a quick wash with water and bingo. its gone. I think its changed to... maybe silver? or Silver oxide. but silver is very unreactive..
in the zinc that is used to make some strat trem blocks, the positive metal ions are surrounded by a sea of delocalised electrons, held together by very strong electrostatic forces forming a giant metallic lattice structure.
pickups took forever to arrive but here she is, the final result...originally had seymour duncans in the neck and mid position but i swapped it for the dimarzio chopper and fast track 1 and really liking what i'm hearing. realized still not much of a classic-strat-sound-dude...heh.