Okay here is a quiiiick how-to. Lots of elbow grease just as a warning.
Make sure your surface has been sanded or at least scuffed up. For plastics I prefer 600 grit, for metal 400grit is fine.
Use a primer first this will help the paint adhere to something.
Then sand the primer smooth with 600 grit.
Paint with color (Preferably Duplicolor)
Spray on lightly and let dry. Do this a few times until you achieve a good durable layer.
Clear coat using the same "type" of clear. Don't mix paints like laquer and enamel, or you will end up with wrinkled paint.
Same technique light layers, until a nice coat is built up. Make sure that it is at least 4-5 layers to protect it.
Sand the clear with 600 and move on to...800>1000>1500>2000. Be sure not to cut through the clear and into the color coat. Then go ahead and take a rubbing compound and work at it. After that use a Polishing Compound. If you want you can wax it, but let the paint cure at least a few weeks before you do.
If you need any help you can contact me. I can show you how to do it if it will help.
Here is something I did for a friend of mine to show you how it will look.
Working on the last stage clearcoat sanded and working on rubbing + polishing compound to bring out color.
Finished product.
