If you have the 510-N Torpedo by Bauway, I would recommend not painting it. This was my very first
mod, and I purchased it September of 2011. Shortly after, the Chrome plating started to tarnish, and I decided I would take Plasti-Dip to it, since it was a "removable" paint and wouldn't be permanent.
Long story short, the top section with the switch is a single piece that's glued together, and once paint gets into the switch, you need a replacement.
I'd buy just regular vinyl or carbon fiber sheets of eBay and cut it to fit your mod. There's only one switch button, it should be fairly easy and straightforward.