How to turn your Aluminum Heads into a polished showpiece: Now i'm done with polishing the outside i'm concentrating on porting and smoothing out all the casting flash inside the intake and exhaust ports. I'll post more pics in a few weeks as my engine goes back together and back into my camaro... Aluminum heads disassembled and cleaned. Sanded with 120, 220, 320, 400.. Hours of hand sanding done. Polished. The pictures barely do justice how blingin these heads are now. Almost need sunglasses to look at em.