it can be done... and can look great... but... if not done right it will fade,crack,peal,run,oragepeel,smell bad, look bad, and be a waste of time.
I have painted a few cars with spray cans one was a 240 we did with 15 cans of walmart .99 cent spray paint in gloss black. Came out great. Still looks fine... but is faded. Had it been cleared for another $10 the car would look like it had a $400 super macco paint job.
Talk to Evan since he has painted parts with WRB in a can. He will def give you advice. PM him he is friendly to most. If he is mean to you then dont worry you prob suck as a person. I hope you dont tho.