Okay, here's the deal (at least on a 2010 Patriot Sport with a May 2010 build date). The bumper step clips on my rear bumper cover. I started removing the first two clips just to see. I didn't go any further because, 1) I didn't need to yet, 2) there may be a couple of screws accessible only from inside the bumper cover. I've had my cover off for the hitch install but didn't note the step at the time. The removal should be a 5 minute task next time though. So if the step is detachable, all is well as far as cleaning, painting, or Herculinering (is that a word?). I suppose a guy could even fabricate a replacement out of aluminum Diamond Brite?
And if you remove your step before I do, please post some pics of the attachment points.
BTW, if you find gallon Herculiner kits for less than $79 delivered, including tax and shipping, please post.