Originally Posted by
grant15clone
At first I thought that it was rust, but it doesn't seem to be. It feels like some sort of baked on substance almost like glass beads. ~G~
It does look like an insulation layer. (It also looks like advanced rust to be honest)
I would use baking soda and water to clean the whole thing and then once completely dry (Baked or a couple days) then do conductivity test on every element I could contact to map out its electricity flows. If there is not "bad flows" then go for it.