Can you spray a car with an airless spray gun?

You can spray a car with an airless spray gun in theory, but it is not recommended and not ideal for automotive painting because airless sprayers produce high pressure, large droplets, and more overspray, resulting in poor finish quality compared to HVLP spray guns designed for automotive basecoat and clearcoat. Airless sprayers are designed for house painting, walls, fences, and large surfaces where speed matters more than fine finish, and they atomize paint at 1500 to 3000 PSI creating coarse spray that leaves orange peel, runs, and uneven coverage on cars, making it difficult to achieve smooth, glossy automotive finish. Automotive painting requires fine atomization, precise control, and low pressure provided by HVLP gravity feed spray guns with 1.3 to 1.4 mm tips for base and clear, which produce smooth, even coats with minimal overspray. Airless sprayers also have large tips like 0.015 to 0.021 inch that apply too much paint too quickly for car panels. However, you could use airless for spraying primer, truck bed liner, or undercoating on car where finish is less critical, or for fleet vehicles where appearance is not priority. For quality car paint job, use HVLP or LVLP spray gun, not airless. So technically possible but not recommended for final color and clear.