Long story short, I have a ****** paint job. I have a black coat of the stock paint that came from the factory. Then there is a top layer of my two tone OVER the stock paint. Then there is rubberized undercoating OVER everything, and then that was shittily painted black. My question is, can I sand my truck down by myself? The rubberized coating is stuck on the paint beneath it, not on the actual panels. I was ablel to chip some off easily with a screw driver.