try it agian with someting like 1500 and take your time! i spent about 4+1/2 hours on EACH lense! but mine look BRAND NEW! so its all about what your going for... i will work, i promise! just take your time and keep it wet!
Edit: here is EVERYTHING i did to make mine look BRAND SPANKING NEW!!!
-You need grits 320,600,800, 1500, 2000, and 2500 of Wetordry sandpaper, Mother's metal polish, a rag, Plastic polish, and a buffing wheel (I used a plug-in Black&Decker 7" 2 speed, 3/4 HP buffer).
Start off by removing the entire headlight housing from the car. Begin wetsanding the surface with the 320 grit and KEEP IT WET. Take your time and make sure you sand equally over all of the lense. Keep at it with the 320 until the rockchips are gone. Next, move on to wetsanding with the 600 grit, then to 800, 1500, 2000, and 2500. I took at least 7-10 minutes with each grit for best results. Now, the lense should look really fogged up and way worse than when you started. This is normal!
IMPORTANTbreak for smoke between each grit change...
Take a cotton rag and use it to rub metal polish across the lense. Begin buffing it by hand using the rag. Be generous with the metal polish and put some muscle into it. Take at least 10 minutes with this stage.
*another smoke...
Now the lense should look clear, but no very glossy. Take another rag and use it to smooth plastic polish over the surface of the lense. Now use the powered buffing wheel to buff the lense until all the polish is gone and the lense is looking glossier. With an amazing 3/4 Horsepower-powered wheel, I had to secure the headlight housing between my feet. Do this 4 or 6 times.
* smoke breaks between obviously!
If you completed all of the above, the headlight lense should look as good as new. Stick the housing back in, switch on your lights, and be amazed.. It looks clean
hope that helps...
