Choosing Your First Spray Gun

Selecting the right spray gun is crucial for painting success. This guide breaks down options by experience level, budget, and application type — then walks you through setup, testing, and maintenance.

Gun Type Overview

Aspect	HVLP (High Volume Low Pressure)	Gravity-Fed (Standard Air)
Best for	Beginners and hobbyists	Professionals and experienced DIYers
How it works	High volume of air at low pressure at the cap	Medium to high pressure (20–40 PSI at cap)
Overspray	Low — more paint hits the surface	Moderate to high
Learning curve	Gentle; forgiving of mistakes	Steeper; requires technique
Compressor need	Larger air volume (CFM)	Smaller (12–15 CFM typical)
Best products	Basecoat, metallic, candy, specialty finishes	All types; fastest on primer and clear

HVLP is ideal if you're painting for the first time, working in a garage, or want minimal overspray. Gravity-fed is better if you've painted before, have proper ventilation, and want the fastest application.

Which Gun Should I Buy?

Entry-level: TSS Spray Guns — HVLP gravity-feed hybrid with a 1.3mm nozzle (basecoat) and a 1.5mm option (clear). An affordable entry point that includes an instruction guide and is adequate for small jobs. Best for one-time projects or testing before investing more. Shop TSS spray guns

Mid-range: Walcom & Devilbiss — Professional HVLP and gravity-feed options. Better build quality, a more precise spray pattern, consistent results, and a 2–5 year typical lifespan. Best for serious hobbyists planning multiple projects. Shop Walcom · Shop Devilbiss

Premium: Sata — German-engineered gravity-feed precision. Exceptional finish quality, 10+ year lifespan, and the industry standard for professionals. Overkill for one-time projects, but unbeatable for shops. Shop Sata

Nozzle Size Guide

Nozzle size (tip diameter) determines spray pattern and product compatibility:

Size	Best For	PSI Range
1.3mm	Basecoat, fine detail, metallics	25–30
1.4mm	All-purpose (basecoat + clear)	25–35
1.5mm	Clearcoat, primer	30–40
1.7mm	Primer, heavy filler	35–45
2.0mm	Heavy primer, specialty	40–50

Basic setup: 1.3mm for basecoat and metallics, 1.4–1.5mm for clearcoat. Keep different nozzles for different products to reduce cleaning.

Air Pressure by Product

Product	PSI	Too High?	Too Low?
Basecoat	25–30	Orange peel, over-atomization	Poor coverage, runs
Metallic base	25–28	Uneven sparkle	Pigment settles unevenly
Clearcoat	30–35	Fine mist, high overspray	Poor leveling, orange peel
Primer	35–40	Good atomization but overspray	Thick droplets, poor flow
Candy / specialty	20–25	Too thin, poor coverage	Thick and chunky

Important: Always measure pressure at the spray cap, not the compressor. Cap pressure is 5–10 PSI lower than compressor output.

Pre-Spray Checklist

Gun cleaned thoroughly (old paint blocks nozzles)
Fluid cup filled properly (not overfull)
Air hose connected securely
Air pressure set to product specification
Fluid adjustment set (should drip 1–2 drops/sec when trigger pulled)
Spray pattern test performed on cardboard

Spray Pattern Test

Hold the Gun Perpendicular
Hold the gun perpendicular to a piece of cardboard, 6–8 inches from the surface.
Squeeze the Trigger
Use a smooth, steady trigger squeeze.
Check the Pattern
Expected pattern: round, even, 4–6 inch diameter.
Adjust
- Streaky/uneven → Clean nozzle or needle
- Too wide → Reduce air pressure
- Too tight → Increase air pressure
- Dribbling → Adjust fluid control

Common Setup Issues

Problem	Cause	Fix
No spray	Clogged nozzle or stuck needle	Clean nozzle; backflush gun
Sputtering	Air leak or low fluid	Check seals; refill cup
Uneven pattern	Dirty nozzle	Clean with gun cleaner
Dribbling fluid	Needle stuck open	Soak and gently clean needle
Pressure drops	Compressor too small	Let tank build; size compressor to gun