I had overlays installed on my 2012 WRX, when I had my tint done which cost a totally of $70( a little too much i think). The tint guy told me that these usually don't last very long and will start to peel after being out in the sun for awhile. And having the OCD that I have, I didn't want to have to deal with that so I went and bought VHT brake light lense spray and last night. I sprayed my tail lights red using 3 coats of VHT and then 3 coats of clear lacquer. I used 1200 grit sand paper and pulled off the lights lightly sanded them. wiped them down with lacquer thiner until there was no residue. Then sprayed 3 coats of VHT, then wet sanded with a little dish soap until it felt fairly smooth without taking of too much paint. Wiped that down with water and a mrco fiber rag and then dried it with another. Then i sprayed crystal clear lacquer. I liked the finish of it so i left it, but if you want a smooth glassy finish you would wet sand it again and then polish it. I suggest this route instead of overlays any day! A quarter of the cost and 5 times the quality!