Painting a bike frame?

'm going to paint the frame on my SS 29er here soon. Trouble is... I don't know what color(s) and what kind of paint. I have the equipment (gun, air compressor, thinner and mixing cups) and experience to spray auto paint from my local auto paint shop. They have PPG which is pretty much the best stuff. I can do base/clear or single stage which is easier. Or I can go the aerosol route. I'd sand it down, prep it with alcohol, prime it then do whatever. I just don't know if it's worth the trouble to go the spray gun route. I want to go aerosol but don't know if it'll work out in the end. Any experience doing either way?