Remove Hedman paint?
I would mount them, start them and burn the paint off, What doesnt come off, just paint over. They paint them for corrosion control only, and to cover crappy welds. Oil would just piss off the shippers who would have to deal with soggy boxes and customers that would mount them and run for the hills when the smoke starts to billow off them. Bare headers would flash rust in the box and would get returned for selling a rusty product. Its a no win for Hedman except MAYBE.....painting them with BBQ paint to start with!