I was bored today so I decided to do this, and show what I did/used so anybody else that wants to can as well. My taillights were pretty scratched, and getting dull. In the past I've used plastic polish but these lights were too far gone for just that.
1500 and 2000 grit sandpaper if doing by hand
2000 grit DA pad.
I used a DA POLISHER, the big heavy sanders are way overkill for this type of thing.
A plastic/headlight polish
And about an hour if doing by hand, 15 minutes if using a DA.
I got lazy and just taped around the lights, best is to remove them.
Now wet sand, use your fingers to feel for the scratches and keep going till all is smooth.
That's what youll be left with after drying. clean off any residue from sanding and break out the polish. I did it by hand as my buffer would have been serious overkill.
This is the passenger side light, it was by far the worse of the two, not a single scratch and nice deep shine now
Little projects like this always make you smile.