First off let me say that this is the worst intake I've ever owned. The other day I'm working on my car and I noticed my upper manifold was cracked in two spots. It cracked where it bolts to the lower and I think it was leaking. It also cracked at the vacum fitting which was my fault, but I bearly tightened it and it cracked. So I took the manifold off and put a straight edge to the mounting surface and it was warped about .050" across it. Let me also add this intake has under 50 miles on it. So I bring it to work, weld up the cracks, mill the mounting surface back down and got it straight. So today I bring it home and since I had to sand down where it had to be welded, plus there was now alot of scratches in the finish, I decide to strip it all down and polish it. So I get all the coating off and get it all smoothed out and hit it with some compound and it won't shine. I just spent the last 3 hours trying to get this thing to shine with no luck. I think this manifold is made out of the worst metal in the world. Did anyone else run into any of these problems I had with there's? Cracks? Warped? Most importantly, did anyone ever polish one? Now I don't know weather to give up and repaint it or keep trying. Sorry this is so long.