Ok, I am going to tell you how to tint light lenses on a Car
Firstly let me say, DO NOT OVERTINT!!!!, you will get a ticket secondly, I am not responsible if you screw this up
Tools that you are going to need:
Can of VHT light tint
Can of Clearcoat
Menthal hydrate (surface cleaner, light lacquer thinner, but it won't melt plastic)
LOTS of patience is needed
1. Remove the tailight/turnsignal/parking lamp
2. Remove the bulbs from the unit
3. Use the exacto knife to remove the DOT numbers, and any other raised lettering (these will screw up the tint, capillary action will cause the tint to flow into the letters, making it fugged up around the letters)
4. Gradually using the sandpaper, starting with the 120, sand the letters off more, then goto the 240 getting rid of the damage the knife and 120 grit paper did.
5. Use the 500 grit on the whole lens, smoothing out any ridges and bumps on the lens. Finishing off with the 1000 grit. Using water at this stage will keep the sandpaper from gumming up, and I find water sanding is better for a nicer finish.
6. Mask off all the areas that you don't want tinted IE : reverse lights, but that is personal preference
7. Clean the area with menthal hydrate
8. Tint, use thin coats instead of a heavy layer, let dry and repeat until the desired darkness is aquired
You can stop here, it will look good, but if you want a perfect SHINY surface, keep going
9. Wait till the unit is 100% dry, IE overnight, using wet sanding and the 2000 grit, lightly, VERY lightly sand the tinted surface, making sure all the dust bunnies are out of the tint
10. DO NOT CLEAN with menthal hydrate, this will take off the tint, clean with a very diluted soap and water mix, making sure the lens is very dry before trying the next step
11. Spray with clearcoat, again thin coats, and take your time, repeat 3 or 4 times, if you want, do more 2000grit sandpaper between layers of clearcoat.
12. Reinstall the units.
Have fun with it......