I did something like that to my dad's old Italian Merkix from the '80's. it came out SWEET!
Funny, it has Chinelli bars on it, which I chopped and flipped. It looks hella SWEET upside down, like "Illen Inc" or something.
Just don't leave the seatpost in when you get it powder coated. You'll never be able to move it. Don't ask me how I know. Stupid Merkix!
BL