So, I was going to polish/seal my buddy's 1996 Nissan Pathfinder. I can't tell if it has a clear coat on it, his finish is pretty dull but it may be from years of neglect. I was planning to use the Menzerna Powergloss and then the Menzerna SIP, followed by some Klasse. Would any of this screw up his paint if, indeed, there is no clear coat on his car?