Car paints will work, but before you spray the color you shoud build up an even layer of "undercoat", or basecoat as some call it. Spray about 4 coats and let them dry for a few days. Then sand them level with 240, or as high as 320 grit sandpaper. Make sure you keep the body very clean during the whole process. Any oils introduced by excessive touching or any other source will give you major headaches.
So, the next step is to spray the color, or colour, as it is over there.

If you're good with a spray gun you may not want to add a topcot, but a topcoat will afford the most protection to the color and prevent premature wear. Topcoats generally need to be sanded and buffed for the ultimate glossy appearance, but again, if you're good with the spray gun, it may not be necessary.
Good Luck
BTW, the plasti-kote link didn't work for me.