I bartered for a bike recently and I was not digging the purple color scheme so I decided to paint it! In order to end up with a professional looking paint job I stripped all the paint off the frame to bare metal. Primed it. Then I painted it my favorite color with automotive paint and finally coated it with 5 coats of automotive clearcoat.
I use citristrip as it's a little easier on the environment and the human body (aka magicsauce)
cling wrap keeps all the solvents and special magical chemicals in the magicsauce right up in the paint's grill
tooth brushes work really well to spread around the magic paint peeling goop (just don't use it afterward to brush your teeth
scuff the paint first it makes it easier for the magicsauce to do its work.