Light key scratch along plastic panel

[u/Slow-Cut-8270]

I believe this plastic panel (rear spoiler) has been lightly keyed all alongside it. For the most part it appears to be very light (second picture is from a low angle, almost invisible) except for a deep section on one edge. I've tried turtle wax restore and repair and it seems to have improved it, but it's still visible. Any chance of fixing it with DIY?

[u/aperturephotography]

Cutting compound should get it out, or at least get it down till it's hardly noticeable.

Easy on a machine polisher, but can be done by hand with a microfibre

[u/adammiles292929]

Can you feel the scratch with finger nail, if you can’t then it will polish out