first seal then, fill ,block sand,prime, putty,sand prime sand, clean clean clean before first color coat, do one color coat then sand with 400, do the next color coat then sand with 800, next color coat then 1000, final color if you want real deep pain two final color coats, then sand with 2000, now clear coat it do at least two coats and sand in between coats with 2k paper. Rattle can paint can look quite excellent if you do all these steps be sure to clean, clean clean before laying on paint. Also let primer dry for at least a day before sanding. Color coats should dry for a few days at 85-100 degrees. (I put my small stuff on the water heater or boiler) The color sand then with plenty of water. Let the last coat of clear dry for at least a week so all the paint can out gas correctly. You can buff the final clear coat but I some time go one step further and use micro mesh 6k and 12k for the final sand wet. I then use a good wax for a real deep shine.
With the parts you have you should set up a small booth use some plastic and strapping to make it. Wet the ground in the area you are going to spray you may also want to incorporate a fan to pull the fumes and atomized paint away from your work.
Automotive type paints would a better choice if you had a compressor as they will cut down on the drying times drastically. (they out gas so much faster than rattle cans)