I just painted with krylon fusion and clear coated, I'm not expecting a professional job or for it to last forever. My friend has been riding for the past year with his plastics painted in the same fashion and they haven't cracked, flaked, or scratched at all. If it lasts a couple months or a year like his I'll be happy. I have no problem repainting them again later down the road.
I don't have a wider rear and don't plan on it at this time. They are bigger than the stock fenders but they are only like 2 inches wider on the sides. Those pictures were before I had the brackets on and they look a bit better now. I like the look so I'm happy with it as is, others are entitled to their opinions as well. Thanks for the comments.