After reading and researching here for about a month I decided to do my '92 White Jetta. My plan is wash, clay, wash, 1ZPP and 1ZGW. The paint is pretty good considering it's old and I've only used one step products like Turtle Wax and Meguiars Cleaner Wax on it. The top surfaces are pretty dirty and have a little oxidation. My question is should I use a paint cleaner like Meguiars Medallion between the claying and the 1ZPP or would this be a waste of time and product? Also, would the 1Z products apply well over a cleaner like Meguiar's? Thanks.