Sue, your cladding must have been coated, or recolored somehow, at some point in it's existence. Just the difference in the exposed vs. unexposed color as well as the fact that it looks like the torx screw in the above photo has been painted over too. My torx srews are black (or they were before I painted them silver) and not grey like yours seem to be. All of this could be why your Refinish/Restore didn't take to your cladding even though you did the surface prep correctly.