At least I think thats what its called.

Its a process that smokes your lenses like how the taillights on the late sapphires come and what people swap the rear lights for on the rs turbos.

In a very old Revs magazine I see this service advertised and they did it on a Renault 5 Turbo but it was many years ago and I dont have the magazine anymore.

I basically wanna get my clear saph front indicators smoked, but I dont really like the look of the tinting spray mehtod.

I dont really know anthing about the technology behind it but the lenses on the R5 looked like factory smoked items