Ok, i've been wanting to do this for a while, but I just got around to it. I plan on polishing off the opti-coat from my front bumper, polishing and jeweling the paint and then reapplying it when I have a good 2 days where I don't need to drive anywhere.
Anyway, until that time comes, I opted tonight to do a quick fix on my bumper. With the extremely hard water we have here, water etching is very bad and while dirt doesn't stick to OC much... minerals can and will and water spots are going to happen... obviously more so with harder water.
I used a white pad with some Klasse all in one, here are a few before and after pics. If you have soft water, you won't likely run into this problem by the way.