So what is the major difference between Pinnacle Black Label Diamond Paint Coating and McKees 37 Paint Coating? Seems they are very similar yet the McKees is about half the cost. I did read the PBL allegedly lasts up to 3 years vs 2 year for McKees.. but really don't expect that kind of duration from either one. Can you apply a wax over either one? Anyone used them both? Just wondering if the PBL is worth the extra cost... I'm kinda thinking not, but looking for some opinions.