Originally Posted by redgoober4life

Get some plastic polish. There are some that come in kits of 3, super aggressive, medium agressive, and light agressive (abrassion level). Start with the least aggressive and see if that gets them all out, then move to the next level of abrassion. If you end up using the most agressive of the 3, then polish them with the medium, and the light. Polishing is not like waxing, you have to "work" the product more. Essentially, you're levelling the surface to the level of the pits. Of course, nothing will make it 100% new, but with some work you can get them looking good again.

You should be able to find the Meguiars locally.

If you can find Novus, it's suppose to be one of the best. May not completely get rid of the pitting, but it will make it less noticeable and the lenses will be clearer.http://www.spadepot.com/products/005novus.htm