United... You know just as well as I do that the skinning tutorial they have at Skinner's Heaven is of little use to AH2 skinners, and your tutorial glazes over a lot of detailed work (layers, anyone?).
I'm in the process of making my own skinning tutorial. It will show you how to make panel lines/rivets, use layers, make scratches, add weathering, and so on. It could take a few days, but expect it soon on my site.