My new-to-me E85 was recently purchased out of state. There are 62,000 miles on it and it has been very well maintained. I used Chemical Guys Butter Wet Wax on it, and noticed there is a slight grittiness to the finish, almost like overspray. There are no signs of paint or body work... just this unusual finish. Can anyone tell me if this is uncommon? It's silver gray, looks great, just feels weird.