Watch for UV fading in the sunlight, we had two of our shops painted a flouro colour and the paint faded badly after a few months in the sun. Worse thing is it LOOKS faded, with the more exposed areas a very different colour, and the crevices are the original colour.
I think the paint that changes colour with viewing angle is ok, the colour comes from fibres (prisms) in the paint.
The worst fluorescent colours for UV fading are the pink, orange, yellow.
PS. We even tried a run with a UV protect clear coating over the top, just slowed it down a bit. Pink printed matter and business cards do the same in sunlight too.
[This message has been edited by 99TLR (edited 28 September 1999).]