[914GT]

I picked up a pair of BMW 320i calipers this afternoon for fifty bucks, and now getting them cleaned up and ready for machining. They look good as-is and I don't know if I'll rebuild them yet. Anyhow, I was reading a PP tech article about painting calipers and it said they sent them off to be sandblasted and powdercoated with the pistons still in the calipers. I'd like to powdercoat these but I hesitate to stick them in the oven and risk damaging the rubber parts. I know brakes get hot, but I don't think calipers get THAT hot. Is this a safe thing to do or should I just use some high-temp paint?