G6 or F9??
i just started compounding my trailer and as you can see from this picture there is some deep discoloration from a P.O. who had tarp pulled over the front of it. i started out today using F7 but it took a very long time to get the corrosion out, and although you cannot see from this picture, it still is not completely removed from my polish test spot.
from what i've been reading the F9 is pretty aggressive and am leaning towards ordering the G6 but was looking for some advice based on some of your experience with things like this.