A buddy of mine had 2 guys on his hood, while he was driving. He hit the brakes, and the went a-sliding off. Welp those little button's on jeans left a nice scratch on his car. He hit it up with some GS27, and it kinda went away. At a certain angle you could see where it was.
We also tried it on a co-worker's keyed truck. Took it out pretty well. However at an angle, you will always see it. Never had any experience with the filler (crayon looking things). Good luck...