Install deep fiberglass or stainless steel utility sinks in the paint room. Two sinks are the minimum. Equip the sinks with faucets that are tall and arched and that you can swing out of the way. Supply hot and cold water to both sinks. Insert deep debris trap cups inside the sink drains.
Construct long utility-grade counters on both sides of the utility sinks. Include utility storage shelves underneath the counter tops that are at least 15 inches tall to accept stacks of roller paint trays and 5-gallon plastic buckets. Build these counters and shelves out of 2-inch-by-4-inch studs and 3/4-inch plywood.
Build a large pegboard rack in the paint room. Construct a rectangular frame for the pegboard out of 2-inch-by-4-inch studs. Nail or bolt the frame to the wall. Tack the pegboard sheets to this frame.
Hang pegboard pins and tool holders on this pegboard. Install all hand-held painting tools, like brushes and roller handles, on the pegs. Drill holes through the tool handles if necessary. Paint around the outline of each tool as it hangs on its peg using a liner brush and bright yellow paint: this will help keep track of equipment.
Make liner brush storage cups from large plastic mayonnaise jars. Drill a few small holes in the bottom of the jars. Connect these jars to a scrap of 1-inch-by-8-inch dimensional lumber using plumber's strapping. Run a very tight collar of strapping around the neck and waist of each jar, and then nail the strapping to the mounting board. Mount this board over or near the sinks. Store clean liner brushes in the jars, brush handles down.
Mount a strip of pegboard near the sinks and install 1 1/2-inch pegs. Drill holes in all the handles of sash and 4-inch wide paintbrushes. Hang brushes here to drip-dry after cleaning.
Build three storage shelf units for paint cans. Space the shelves15-inches tall, and build them only 18-inches deep. Limit the height of the shelf units to six feet. Designate one of the shelf units for "New Paint," paint that has been unopened. Designate another unit for "Active Paint," paint that has been opened. The last unit should be reserved for "Empty" paint cans.
Sheath any open sides of the two paint shelf units that hold paint. Use tempered hardboard or plywood for this sheathing. Fashion simple side-by-side cabinet doors from 3/4-inch plywood and utility door or strap hinges. Install a hasp lock on each set of doors so you can padlock the paint cabinets closed.
Spray paint a steel cabinet with doors, or a steel file cabinet, with bright yellow spray enamel. Create a diagonal pattern of black stripes, using black gaffer's tape, across the doors to signify "Warning: Flammable Liquids." Store all flammable paints and other combustible liquids, such as paint thinner and acetone, in this metal cabinet.
Hang a 2-inch diameter steel pipe from a ceiling truss, about six or seven feet off the ground. Use chains to suspend the pipe from the truss. Close the loops of the suspension chains with steel carabiners. Wrap lighter chains around the pipe, spaced about 20 inches apart, so that a foot of chain dangles free. Close the chain loops around the pipe with carabiners. Wire hooks to the dangling ends of the light chains. Store large plastic buckets and other larger painting equipment, like garden sprayers, from these hooks.
Set two or three empty 5 gallon buckets, each with resealable lids, on rolling plant stands. Pour all left over stage paint into these "Gray Paint" buckets.
Thread a loop of heavy twine through the nail puller hole in several small pry bars, through a hole drilled through the handle of several rubber mallets, and through several paint can keys. Hang these tools on pegs throughout the paint room to encourage proper opening and closing of paint cans.