Spray Gun

What Is a Spray Gun and Why Does It Matter?

A spray gun is the cornerstone of any professional automotive paint job. By atomizing liquid coatings — primers, basecoats, clearcoats, and specialty finishes — into a fine, even mist, spray guns deliver results that no brush or roller could match. The right spray gun means the difference between a showroom-quality finish and one that requires hours of wet-sanding and rework. Whether you're a collision repair technician restoring a panel to factory spec or a custom painter laying down a flawless pearl, the spray gun in your hand defines the outcome.

Understanding Spray Gun Technology

Modern spray guns are available in several feed and atomization types, each suited to different applications and shop setups:

• HVLP (High Volume, Low Pressure): HVLP spray guns use a high volume of air at low pressure to atomize paint, reducing overspray and increasing transfer efficiency — great for getting a smooth finish while minimizing material waste.
• LVLP (Low Volume, Low Pressure): LVLP guns use even less air, making them ideal for shops with smaller air compressors. They also create less overspray and can offer better control on detailed work, though they may spray more slowly than HVLP guns.
• Gravity Feed: Paint is held in a cup above the gun body, relying on gravity to deliver fluid to the nozzle — popular for their efficiency and ease of cleaning.
• Siphon Feed: A cup mounted below the gun uses air pressure differential to draw paint upward — better suited for high-volume spraying with thicker materials.

Nozzle size is equally critical. The ideal nozzle depends on the kind of paint you're spraying — for basecoats, 1.2 mm to 1.3 mm nozzles are typically recommended. Clearcoats, primers, and specialty coatings each call for their own tip sizing.

Top Spray Gun Brands

Choosing the right brand is as important as choosing the right type. The brands below represent the gold standard for professional body and paint work.

DeVilbiss is one of the most storied names in spray finishing. DeVilbiss was founded in 1888 when Toledo, Ohio physician Dr. Allen DeVilbiss combined a bulb, tubing and the base of an oil can to create the first atomizer for healthcare. That legacy of atomization innovation carried directly into the auto industry. Today, the DeVilbiss brand is globally recognized as a leading spray finishing manufacturer for the automotive and industrial industries. DeVilbiss is widely recognized for the development and introduction of the first "Compliant" spray guns, which greatly reduce overspray and VOCs into the environment.

Anest Iwata brings the precision of Japanese engineering to the spray booth. Anest Iwata Corporation is a Japanese manufacturer of air compressors, vacuum pumps, spray guns, and coating systems used in industrial, automotive, and manufacturing applications. Anest Iwata has more than 90 years of experience in coating equipment, providing spray guns with the most advanced atomization technology, the Split Nozzle™, that comes from attentive Japanese craftsmanship in combination with a pioneering mind. Anest Iwata has become a benchmark in the world of spray painting, offering high-performance spray guns trusted by professionals across the automotive, industrial, and fine arts industries.

3M applies its science-driven engineering philosophy to the spray gun category with impressive results. The integrated system with 3M™ PPS™ Series 2.0 Spray Cups and replaceable nozzles delivers the fastest changeovers in the industry, which adds up to faster cycle times and more time in the zone. By engineering the spray gun body from an impact-resistant, stainless steel-reinforced composite material, 3M reduced its weight by up to 50% compared to traditional metal spray guns without compromising durability.

Sharpe has been a trusted name in automotive spray equipment for decades. Founded in the 1920s and currently based in Minneapolis, Sharpe Manufacturing Company specializes in producing automotive paint spraying equipment; in 2003, it was acquired by Graco, one of the world's leading manufacturers of fluid handling products. Sharpe spray guns are available in different categories: conventional, HVLP, and LVLP models offered in gravity, siphon, and pressure configurations.

Astro Tools rounds out the lineup as a go-to option for shops seeking reliable, accessible spray equipment. Astro Tools offers a practical range of spray guns designed for body shops that need dependable performance across a variety of coating applications without breaking the budget.

What to Consider When Buying a Spray Gun

• Application type: Basecoats, clearcoats, primers, and specialty coatings each have different viscosity and atomization requirements.
• Compressor capacity: Match the gun's CFM and PSI requirements to your shop's air supply.
• Feed type: Gravity feed is ideal for smaller jobs and color-critical work; siphon feed suits higher-volume applications.
• Ergonomics: A well-balanced, lightweight gun reduces fatigue on long paint sessions.
• Maintenance: Regular cleaning after every use is critical — use appropriate solvents and cleaning tools to flush out material residue, and periodically inspect and replace wear parts like needles, nozzles, and air caps to maintain optimal performance.