Got my Zaino kit to use on my "new" 2003 BMW. The outside is beading water like it was just waxed, so I'm starting on the inside. Will clean the leather with z-9 and then apply the z-10 to the leather, dashboard, door tops and other vinyl. What, if anything, should I use on the hard plastic (front of radio, steering column, etc.) and the highly finished wood on the dashboard, console, and doors (it has a very thick clearcoat - I think you'd need a drill to actually get to the wood)? What about the carpets and the rear shelf? Should I plan on applying a UV protectant between applications of z-10? Thanks for the help