Hello, new friends. I've just purchased a '99 Legacy Outback which looks terrific (and was highly praised by my mechanic). It was well cared for in and out with one exception which I can't blame the former owner for. I can't figure out why the wheel covers have these bumpy,lumpy areas on all four covers or what to do to deal with it. On close inspection it looks like the metal had some type of clear plastic sealant put on..I would guess, by the factory...it's peeled away or is chipping off...you can still pick at the edges and it flakes off...I would assume that over time road salt caused the blistering that I'm seeing but it's not pretty and I want to fix it somehow or, just bite the bullett, and replace them. It bothers me now that the rest of the car is sparkling bright. I admit it...I didn't even notice the corrosion, or whatever it is, when I was looking to buy it. Are you guys familiar with the problem? Should I try sanding it off? Have a professional restore them or pitch 'em ?