[rsxse240]

These are all excellent tips. a few I had never heard of or tried.

One tip I always try to use that I learned from building model aircraft and military miniatures is always color the edge of the lens or glass. It makes the part look more realistic in thickness because you can't see how thick the plastic is. Now if you have a clear piece to represent a colored lens, I suggest painting the outside of the lens with a light coat of amber or red, whichever you are using, then do the inside as well. If there are parting lines in the lens between say a headlight lens and corner marker, use some black acrylic paint and fill in the panel line and a damp paper towel to wipe any excess from the lense. Silver works best for backing on colored lenses, but I try to use polished bare metal foil, or equivalent in headlight buckets.

I have used Testor's window maker/clear parts cement for about 20 years now...and I still use the same original bottle I bought way back then, if you can believe that. I would try to stay away from any CA type glues for fear of fogging or etching from the vapors. Clear paint works very well as a lens adhesive.

One thing you should always try to do is look at a 1:1 car for tiny details like how the lights are assembled, colored and their fitments. This will give you a clear idea of what needs to be done to make it look real.