Awesome change! Do you have to use a da or machine? Or can you do it by hand?
You can do them by hand, just need a bit of elbow grease with the wet and dry and polish to refine the sanding marks.
I just use 2000 grit 3m paper on the DA for speed, then zip over the lights with some polish after.
Stuntys lights can still be worked further on but I needed some paper with a little more bite, I'd say about 70% correction achieved.
See here, I started these lights by hand then swapped to DA
http://www.cliosport.net/forum/showthread.php?p=8518520