I've got some crappy swirl marks in the black plastic on the sides of car and above hatch (the piano black finished plastic) and some light swirl on the tridion. I went to my local car wash after trying turtle wax brand ice liquid wax which didn't help but left the car feeling like a oily mess. They washed the car and then applied paint sealant on all the surfaces which fixed the issue. I was left wondering what is the best to use though vs wax and if this paint sealant was worth it's snuf. The guy told me it should last long time (6 months) which is way longer than a wax.