Yes you can. Go get you the color you want, and primer too. Advance, Auto Zone, even White Trash Mart... I mean Walmart. Sand, clean, spray. Spray light coats. Then wet sand and buff. I've seen guys do this before and its not half bad. In some cases, better than a booth and gun job.
I could be wrong, but wasn't it you that said you were going to paint them diff. colors, just cause you can? If you want my opinion...Do It!
Speaking of Walmart, has anybody gone to Peopleofwalmart.com ? If you haven't, check it out. Then you'll understand why I hate White Trash Mart...I mean Walmart