So I'm redoing my old school hardrock to be a burly drop taking machine. I just bought a singletrack wheelset, some new brake levers, and a single speed kit to convert the geared Hardrock to the almight SS. I'm looking to really spice it up and do a custom paint job. Nothing to fancy but I had a few questions. What would be the best spray paint to use? I'm looking probably for something thats not going to run horrible and is going to look decent. Also, can I paint over my existing paint job or should I go through the trouble to sand it all down and then paint it? I'm open to any suggestions. I'm thinking of going with a black down tube and half top tube and a lime green swingarms and remaining top tube. Put some a custom graphics kit and I think it'll turn out sick.