....those annoying black scuff marks on the inside door panels, door speaker grills and door sills. I found a wonderful product that works perfectly for this. It's called "Mr. Clean Magic Eraser". We've used this for years to clean black heel marks on linoleum floors. They worked so well on the floor, that one day I got the idea to try them on the car. You will be truly amazed at how easily they clean scuff marks from the car. No heavy pressure or vigorous scrubbing is needed. All you do is wet the sponge and wring out the excess water. Then, just lightly rub across the surface to be cleaned. Voila....marks are gone! Best of all, there are no chemicals involved. The sponge is made from some kind of special material that removes marks without abrasives. You can buy these at any department store. Since they're not specifically made for cars, I doubt if you'd find them in automotive stores, but they should start selling them there too.