i also do powdercoating and if you do get them done make sure whoever does it uses high temp powder, for exmple standard chrome powder is baked at 75 degres less than standard colors cause it will start to yellow and lose its shineness at higher temps, it gets baked at 325 for 20 min and if you leave it in to long it will also start to yellow, just think how it would look after a day of riding with your pipe temps!