Very funny you mention the finish of the wheels. I have really good advise for anyone who buys these wheels.......
Don't scratch the finish!!
If you ever try to get them repainted, or a bend fixed by a wheel repair shop be prepared that they won't be able to match them. I bent one of my front wheels 2 months after I bought them. I sent the wheel out to a shop I had experience with (we sent all our Porsche wheels there). The owner of the shop called me back and told me he couldn't fix the wheel. His reason was once he bends the wheel back into shape they need to refinish it. The process slightly damages the wheel and they always need to be repainted. The problem however, was that OZ uses a special type of paint, best described as a matt liquid chrome and the paint can't be purchased here in the states because it is highly toxic!! I didn't believe the guy so I called an extremely reputable body shop here in Jersey that I also used to deal with. The owner is a good friend of mine, he laughed at me when I told him the story because it was true! He had a similar experience with OZ wheels that BWM used on one of their cars (I think the M3). He told me he tried to repaint 2 of these "BMW" wheels that were slightly scratched in an accident and he couldn't match the paint at all, it looked really bad. When he contacted BMW they pointed him to OZ. After conversations with OZ they told him that the material they use to paint the wheels can't be exported to the US because of our strict regulations on high lead paints. So he was forced to paint all 4 wheels. He told me they never looked correct after he painted them. He had a very good way of explaining it to me. He said to look at the OZ superleggera closely, it looks metallic however there is no metallic flake. He's right, next time you look at the wheels stand back you'll swear it's metallic silver. Then get up as close as you can, you won't see any flake at all in the finish. It's pretty cool, and pretty bad all at the same time.
So anyway, I ended up buying a new front wheel because I couldn't get the wheel refinished without painting all four. Anyone who buys these wheels needs to keep this in mind.
As far as the material the wheel is made of it's cast Aluminum. A few websites (Dali's included) list the wheels as forged. This is incorrect, the wheels are in fact cast, however OZ uses a ingenious casting technique which greatly increases the rigidity of the wheel. The Superlegerra IIIs are forged (and heavy)
