I'm refinishing a Jazz bass with Tru-Oil and I'm just trying to figure out how many coats do I need before it's sealed. It's had about four coats now and it looks really really nice. Am I good to go, or is there something else I should look for. On another topic altogether, does anyone know where I can get a piece of copper to act as a ground, like in the early Jazz basses (between the bridge pickup and the bridge). Thanks!