The right spray equipment makes an enormous difference to finishing quality, speed and material efficiency. Whether you are spraying a single guitar or finishing a batch of furniture, understanding the options helps you choose the right tool for your scale and budget.
Aerosol cans
Aerosol spray paints and lacquers are the most accessible option — no compressor, no setup, no cleaning. They are ideal for single guitars, small projects and beginners learning to spray. Modern nitrocellulose aerosols produce a finish quality that is remarkably close to what a spray gun achieves.
The limitations are cost per litre (aerosols are significantly more expensive per unit volume than bulk lacquer), limited control over spray pattern and fluid flow, and the fixed nozzle size which is optimised for general use rather than specific applications. For a single guitar body and neck, you will typically use four to six cans (primer, colour, clear combined). For multiple guitars or regular finishing, a spray gun quickly pays for itself in material savings.
Best for: One-off projects, beginners, small repairs, situations where compressor noise is an issue.
HVLP spray guns
HVLP (High Volume Low Pressure) guns are the standard for professional-quality spray finishing. They atomise the coating material into a fine mist using high air volume at relatively low pressure (typically 10-15 PSI at the air cap), which transfers more material onto the surface and produces less overspray than conventional high-pressure guns.
A gravity-feed HVLP gun (with the cup on top) is the most common configuration for woodwork and guitar finishing. The gravity feed ensures complete use of the material — there is no dead volume in a siphon tube. For nitrocellulose lacquer, a 1.3mm or 1.4mm needle/nozzle set is the standard all-round choice. For primers and thicker materials, a 1.5mm or 1.8mm set flows better. For fine detail work and tinted lacquers, a 1.0mm set gives more control.
You will need a compressor rated at a minimum of 7-8 CFM (cubic feet per minute) at 40 PSI to keep an HVLP gun running continuously without pressure drops. A 50-litre tank is the practical minimum — smaller tanks cycle too frequently. Add an in-line moisture trap and an air filter between the compressor and the gun to prevent water and oil contamination reaching the finish.
Best for: Regular finishing work, multiple guitars, furniture, anyone wanting professional results and lower material costs.
Airbrushes
Airbrushes are small, precision spray tools that use very low fluid flow and fine atomisation. They are perfect for detailed colour work — sunburst fading, custom graphics, pinstriping, and any application where you need precise control over exactly where the colour goes.
An airbrush cannot replace a spray gun for applying full base coats and clear coats — the fluid flow is too low, and covering a guitar body would take an impractical number of passes. But for the colour blending stage of a sunburst, for applying tinted lacquer in specific areas, or for custom artwork, an airbrush gives control that a spray gun cannot match.
A 0.3mm needle airbrush is the most versatile size. It can handle everything from fine lines to moderate coverage. A small, quiet compressor (many airbrush compressors are designed for indoor use and run at conversational volume) is sufficient. Thin your lacquer more than you would for a spray gun — airbrushes require lower-viscosity material to avoid clogging.
Best for: Sunburst colour work, custom graphics, detail finishing, touch-ups, small-scale precision work.
Turbine systems
Turbine HVLP systems combine the gun and the air source in a single portable unit. A turbine motor generates warm, dry air (no moisture trap needed) and feeds it directly to the gun through a hose. Turbines are quieter than compressors, more portable, and produce dry air that eliminates moisture-related finishing problems.
The trade-off is cost — a decent turbine system costs more than a comparable compressor-and-gun setup. The air volume is also fixed (you cannot adjust pressure independently of volume as easily as with a compressor), which limits versatility. Turbines excel at production finishing where you are spraying the same material repeatedly and want a clean, portable setup.
Best for: Mobile finishing, production work, situations where compressor noise or moisture is a problem.
Setting up your spray area
Whatever equipment you use, a proper spray area is essential. You need ventilation (an exhaust fan pulling air through a filter to the outside), lighting (bright, angled light that shows the wet surface clearly), and a turntable or hanging system for the workpiece. A pop-up spray booth or a dedicated corner of your workshop with a homemade filter wall (furnace filters work well) is adequate for hobby use. For regular work, invest in a proper extraction booth with replaceable filters.
