I just bought some clears with the intention of painting them... I put them on to see how they'd look clear and I wasn't thrilled. But, I put amber bulbs for the turn signals and it looked sweet at night (a lot cooler than my stock '97 rear turn signals).
Too bad that was the only thing those lenses had going for them. Now I'm trying to decide how I want to paint them... I definately would like to keep the turn signals clear with amber bulbs.