I noticed some fairly deep scratches (1mm) in the plastic part of a lower bumper. It is not painted.

Is there a compound or wet sand method to remove the scratch in plastic? What grit would you try? Will I end up scuffing up the plastic too much? If so, I will just leave it alone. The plastic is made of ABS, flexible, unpainted.

Thanks

 

If you sand the plastic you will remove all the texture. It can be filled, retextured and trim painted, might be your best bet.