I've done both. But the nightshade is better. It's not as hard as you think. No smudging or smearing. Light sanding to the lights, hit it with one coat first then wait aminute or so and go with another coat. For my color I'd do five to six light coats. Do both lights at the same time so they're the same color. Vinyl tint is a bit hard cuz you have to heat the vinyl so u can stretch it over the side. Making sure u get no creases. Let me know which way u go and I'll help