[header] How to do a good base coat clear coat paint job [title] Remove or tape off any windows or non-painted trimming on the vehicle. [step] Anything that you do not want to be the same color of the car when you are done should be removed to avoid accidentally spraying them with paint. [title] Strip off the old paint in the places that need it. 
[step] You can do this by using paint remover or by simply sanding all of it off the vehicle. If the paint is good, then you only need to sand it with 360 grit sandpaper.