I wouldn't really trust any "scratch-remover" or filler or any other liquid product. The only real way to get out these marks would be to buff it out using a two stage polish. If you use a super intensive polish compound, then it will remove the clear coat slightly and even the paint. It should take it right out. You could go to pretty much any detail/body shop, and they would probably be able to take it right out with a quick polish and wax of that area. At the shop I work at, for that process, I'd probably charge around $15 as it would only take about 10 minutes or so.