*mj09: well a nice wheel well depends on a good cleaning, so you could hit it with some degreasers to loosen up those grime and then flush it away with water and use a strong concentration of shampoo with a nice soft brush. As for what product you could use, well you could use Megs Hyper Dressing, Megs Trim Detailer, Armor All Gel, and lastly Microtex Tire Black if its plastic. I actually use their Tire Black on Plastic and Rubber Trims, since its more of a rubber and plastic conditioner rather than a Tire Black, i'll post some pics later, Megs Trim Detailer and Mothers Back to Black are better but definitely more expensive. As for painted Wheel wells a good cleaners wax would be great.