Never tried but it looks to be nothing more then CC, various grades of sand paper (blocks), soapy water, and compound. The problem I see with it is that it will take at least one more polishing step to refine the marring left behind by the compound (especially soft clears), and I cringe at the idea of inexperienced consumers wet sanding their paint. While the block will help focus the sanding on the (higher) touch up areas, I'm confident it's just a matter of time before someone sands through the surrounding areas of the scratch. In the hands of an experinced user this may work well, but IMO it's a dangerous product to offer to the general public. I bet if I spent an hour searching on various forums I could come up with at least a dozen noobs who sanded through their clear.