Trays are undeniably convenient. They make it easy to dip the roller and remove excess paint for a clean paint job. On the other hand, if you're painting a sizable room, you'll need to refill a tray many times before the job is complete. Save yourself the trouble by pouring the paint into a large bucket with a top that's wide enough to accommodate your roller. Add a grate to help remove excess paint, and your workstation is ready to go.