Someone opened their door hard as hell hitting my 2k7 G35 Sedan a few weeks ago. It left a dent right on the crease which I'm hopeful can be removed by a paintless dent removal place. The incident left 4 marks in the paint. I was able to minimize two of them with a cloth and a non harmful cleaning product. They don't actually look like scratches, but they are hard to get out. What can I use that won't harm the paint?

 

If you are going to get the ding PDRed then they will most likely polish out the marks. If not then a quick polish should do the trick.
Most PDR techs will polish the area since it make the repair easier to see.

 

Any particular polish?