I know there are posts out there on this but I just want to make sure I'm going in the right direction. After all of the old wax has been removed from the surface, as I understand it there are products that have an oily film that is not good to use under Zaino. My basic question is which products can be used to remove fine scratches from the finish prior to applying Zaino? Sorry if I'm being redundant here. Assume the surface is in good condition with just light surface swirls. THANKS