Product to appy before Collinite #845 or after?

[john16v]

Hi,



I did a search and didn`t quite find what I was looking for.



My question is what is good to use before using Collinite #845? Is a 10yrs old car w/ lite scratch/ swirl marks? Just wanted a product that help me prep. before #845.



And any recommendation on a product to use afterward?



Thanks :)