Use the por 15 primer and use their tough paint in colors that they have avaialbe. Go to por 15 dot com. and look at their products they have lots of colors and paints to chose from. I would use the hardnose paints if it was up to me. Be different, be bold, stand out from the crowd at least thats what iam going to do. I dont care if it gets dirty all you have to do is wash it. THis paint should not come off for any reason (hardnose paints(por15). My color of choice is the bright green! Go for it and have fun! 
I agree. This is some really good paint i was impressed with how far it goes. And it is really tough. i put 2 coats on and i looks like powder coat.
Poll
