Quote Originally Posted by Merrick View Post
To test this claim do a test and try to scratch the treated paint with your pocket knife (a pocketknife 5.1; a knife blade, 5.5; on Mohs scale), you should not see any scratches if the claim is correct.
Actually, the scratch test doesn't exactly work like that. VW clear measures about 7. Obviously a blade will scratch it.

The reason I used VW clear as an example is because it is relevant to this forum and doesn't carry the "snake oil" merchant claims you are alluding to. VW clear measures 7. Fact. Yet your 5.1 pocket knife will scratch it. Why?