It was from a local auto accessory shop and was in a small aerosol (like the ones touch up spray comes in). It evaporates very quickly, so you don***8217;t get much run . It has an acetone base (look for this to ensure the right product) which takes the shine off the surface of the plastic. Aesthetics was the reason I applied it to the inside of the lens rather than the outside that was suggested on the can. I literally washed out the lens with clean water and let it dry before application. not sure how the assy is on a Lag, but if you can't get the lens off the reflector, be careful not to ruin the reflective surface!! I managed it ok on the bike unit with lots of thin coats, applied through the bulb aperture. Don't spray in loads in at a time and you should be fine.