I just tried a laser pointer (the kind that draws lines to hang pictures) that I bought from the hardware store. Unfortunately, the laser seems to reflect back off of the headlights. I tried pointing from a slight angle and put my hand out where the light should reflect back. There was no diffusion of the laser. (The coat was 5 minutes new so maybe Veil needs to dry more first.)
This is the third time in 9 months that I am applying Veil to my headlights and front plate. This time, I had amazing results - no streaks or bumps but lighter than the previous applications. Because the previous installations looked like road grime, I never tested it.