Hi!
I usually just stop by at this forum from time to time just to see the great constructions being made here. However, I just wanted to give you a hint about the UV problem.
The same problem exist with plastic boats. The UV light will cause hulls constructed in ABS to be whitened in the color, perhaps also the plastic closest to the surface will be getting small cracks. Boats constructed with glass fibre and gelcoat/topcoat will turn yellow in time. Therefore in marine wax and polish products there are some UV protection to prevent this.
Boat usually stay in the water for long periods of time.
Might work here to. Probably best to try with a piece of track or so first... :)
