When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Try VHT night shade. It's a spray paint for lenes. It comes aout awesome. You just mask it off, paint and then buff for a smooth finsih. IT permanently shades the plastic. You can do multiple coats to get is as dark as you'd like.