I smoked/tinted my cars rear lens's. Got a can of spray tint from a hobby shop and ended up putting about 8-10 super light coats on them (it will fish eye if it's done to thick). Then I put 3 coats of spray clear coat on them. They came out looking great. Total expense was about 12 bucks to do my car. Tho I wouldn't recommend as many coats as I did cause they came out real dark !!! here's some pics of how they turned out.