I am not going to polish as I did that in April, and have not added any swirls or scratches (black paint). I am going to apply FMJ (I know, people don't like it, but I do). So I want to be sure that I remove any traces of EX-P for the FMJ to bond well to the paint. The EX-P has been on since June, may be gone already. But I keep the surface well protected.