Use duplicolor. It will give you a nice selection of colors, and it's great paint... i swear by it. You're going to need to sand down what you've already done, and prime over it.
Did you prime it to begin with? If not, you probably had the effect called "fish eyes". That's when the surface tension of the paint will pull it away from a high point on the surface you're painting ( a speck of dust on it can cause this too)
Go get yourself a good red paint, and a good primer and clearcoat, then follow the instructions that i posted in my paint guide.
Good luck to you, if you need any other help, feel free to drop me a PM. I work at a sherwin-williams store, so you could say that i know a little about painting.