[Joebie]

I did a similar repair this weekend.

I used 3000grit wet sandpaper followed by megs 105 on an orange pad, megs 205 on a white pad. Even with 3000 grit sandpaper it took a while to get it back to that factory shine.

If you truly used 200 and 300 grit sandpaper then you need to get some 1000, 2000, and 3000 and then go in that order until all the deep marks are out, HOWEVER, your clear coat will be so thin or possibly non-existent after this that it might just be better to leave it as is. I would be very surprised if you managed to not break through your clear coat with 200 grit.