Okay, so, after looking at the Duragloss website, I have been unable to find instructions on their products. I have slight oxidation and minor scratches on our van, and would like to remove them the as much as possible. What products, and in what order would you use? Duragloss only please.....except the clay bar, which they don't seem to have. Also, best clay bar? Is their 601 PBA worth purchasing? How do you use that? Thank you.