Scrubbing on Cooksports?
Something must be wrong there.
I may be wrong, but my PH1 was on FK coilovers and I never, ever had a single bit of rubbing, even on full lock etc.
Additionally.. The ballasts certainly won't react well to water. Best to keep them protected IMO.
Cups have more caster than ph1's so they will rub more. I ran my track car with no arch liners and xenons with no problems, in behind the bumper does get quite dirty though.
Let it rub through the arch liner for a few days and makes its own hole and the noise will most likely go away, it did with my sportlines.