You might want to go to the site that I'm using for reference on detailing my truck. They sell a lot of products that are too pricey for my taste but they have an excellent section on How-to's with guides and videos.
Also if you go to the Mcguiar's website, they have videos also as well as Mothers wax.
I've never used the clay but I think if you use the scratch-x and then clay, it will remove the scratch-x. You might want to look at the autogeek guide on ClAY BAR usage.
I'm sure other's will give you some advice.