Really depends on your equipment, and what you feel you can do.
On phone, so hard to see how deep they are. But you can flat them back, and machine polish the panel.
At the very least, it will make them less visible, if not remove them completely.
I wouldn't go any lower than 1200 unless your confident.
Then ideally, for a good finish, I use 2000, 3000, 4000. Then machine polish, I used 3M fast cut on a green pad, then 3M extra fine compound with a yellow pad, and lastly 3M ultra fina on a blue pad.
You can get many alternatives, thats just what I use.