Paint Sprayers: Types, Technique, and When a Brush is Better

Sprayer Types

Airless sprayers pump paint at high pressure through a small tip, atomizing it into a fine spray without compressed air. They handle thick paints (latex house paint, primers, stains) straight from the can and are the standard choice for exterior siding, fences, decks, and large interior surfaces. Residential airless units start at about 250 dollars.

HVLP (high volume, low pressure) sprayers use turbine-driven air to atomize paint at lower pressure. They produce less overspray than airless and are better for detail work: cabinets, furniture, trim, and small projects. The tradeoff is slower coverage and the need to thin most paints before spraying. Handheld battery-powered sprayers are a third category — convenient for very small jobs but limited in capacity and finish quality.

When to Spray vs. Roll

Spray when you have large, continuous surfaces with minimal masking: exterior siding, fences, decks, garage interiors, unoccupied rooms with furniture removed, and new construction before trim and fixtures are installed. Spraying a room with furniture, outlets, switch plates, and window trim requires so much masking that you lose the time advantage.

Roll when you have small areas, rooms with lots of fixtures and trim, or when you can't mask adequately (occupied rooms, finished floors). A roller and brush are also better for touch-ups and when you need heavy build on a single coat — sprayed coats are thinner than rolled coats. Most professional painters spray the base coats and roll the final coat for the best combination of speed and finish quality.

Masking and Prep

Masking is the bulk of the work when spraying. Overspray travels further than you think. Mask everything you don't want painted: windows, doors, trim (if you're spraying walls only), floors, fixtures, and adjacent surfaces. Plastic sheeting (0.5 to 1 mil) and painter's tape are the basic materials. A masking machine (a tape dispenser that unfolds sheeting as you tape) speeds this up significantly.

Pre-roll tape edges with a squeegee or your finger to seal them against paint bleed. Overspray mist carries 10 to 15 feet from the spray area, so extend masking further than the immediate work zone. Outside, account for wind — even a light breeze carries overspray onto cars, plants, and neighboring properties. Don't spray outdoors in wind above about 10 mph.

Spraying Technique

Hold the gun perpendicular to the surface at a consistent distance — 10 to 12 inches for airless, 6 to 8 inches for HVLP. Move at a steady pace with straight, overlapping passes. Each pass should overlap the previous one by about 50 percent. Don't arc the gun (the natural wrist motion that creates thin edges and a heavy center) — move your whole arm in a straight line.

Start the trigger off the edge of the surface, sweep across, and release off the other edge. This prevents heavy buildup at the start and end of each pass. For corners, spray into the corner with the gun angled slightly so the fan pattern hits both surfaces. Multiple thin coats produce a better finish than one heavy coat. Heavy coats run, sag, and take forever to dry.

Cleanup and Storage

Clean the sprayer immediately after finishing. Latex paint washes out with water; oil-based paint requires mineral spirits. For airless sprayers, flush the system by spraying cleaning fluid through the gun until the output runs clear. Remove and soak the spray tip and filter in the appropriate solvent. A clogged tip produces an uneven fan pattern and spitting.

For HVLP sprayers, disassemble the gun cup, air cap, and fluid nozzle and clean each component individually. Dried paint in the air passages will ruin the spray pattern. If you're stopping for lunch or a short break during a latex paint job, wrap the gun tip in a wet rag and put it in a plastic bag. This keeps the tip from drying out for an hour or two without a full flush.

Frequently Asked Questions