Re: Spray Painting a car at home?
For quickest blow over paint job, sand over with 800 wet/dry sand paper. then paint over with colour.
For better job, sand with 400, fill stone chips etc with filler stop or stop putty, bog up any dents, sand back filler and bog with 400 to profile, spray over with filler primer, rub back with 800 next day, spray on colour, spray on clear if wanted.
Always use sanding block when rubbing back.
After rubbing back, clean car with industrial truck wash or similiar, air dry before painting.