I recently purchased a few cans of paint from Montana Cans. This isn't lexan paint but those painting graffiti are probably familiar with the Montana Cans brand. I did talk to the Swedish rep before buying and they recommended the Gold series as this is made for flexible materials and it shouldn't have any issues sticking to lexan. Time will tell how well it holds up. I test painted a small piece and bend it over and over without the paint cracking. The reason I picked the Montana paint is because it's dirt cheap compared to lexan paint. I got six 13.5 fl oz cans of paint for $65 inc shipping.
This is my first paint job ever and the body initially had a two tone with silver at the bottom. Turned out that I could peal it off even though I painted with very thin layers. The black stuck to the body though. I had to remove the silver but of course I didn't get it all off so there are tiny tiny silver spots in the black but it looks ok.
This is what it looks like right now.