DJBeasy wrote:Yeahh...powder coating rotors is NOT a good idea. Powder coating involves baking the parts being coated at very high temperatures. Swings in temperature warp rotors. I would advise against this.
High temp paint will work (Duplicolor, Rustoleum), Id also recommend G2 caliper paint. Just make sure you sand/wire brush the hell out of that rusted area first though like Midori said. Yours are pretty bad, you probably wont get a smooth finished surface.
Not quite sure. Powder coating is typically done around 200C, which is comparable to a hot rotor after heavy braking. It's also not hot enough to anneal (reverse any tempering/heat treatment) the steal or change it's properties. I'd say as long as the powder coating is done in an oven that is given sufficient time to cool, it shouldn't warp or damage them.