Despite trying to be careful, over the years the black plastic trim on the lower parts of the MDX' bumpers collected some wax/sealant residue that I just could not get off no matter what I tried. Recently, on a whim, I threw some McKee's 37 Wax Remover for rubber and plastic in my cart. Directions are simple, mist a small amount on to the area and agitate with a brush. This product removed the wax residue that had literally been there for years. I recommend this to anyone with the same issue.