If your spray gun is spitting, you're dealing with one of the most common issues in automotive refinishing. Spitting disrupts atomization, leaves surface defects, and can ruin an otherwise perfect panel. As a professional, I always start by identifying whether the issue is air-related, fluid-related, or contamination-based.
The first thing to check is your fluid tip and needle. Wear or partial blockage will cause inconsistent material flow, leading to sputtering. Remove the fluid tip and inspect it under proper lighting. If you see dried paint or micro debris, clean it with appropriate solvent and a soft brush-never use metal picks that can damage precision components.
Air pressure is another critical factor. Insufficient or fluctuating air supply causes poor atomization. For a LVLP Spray Gun Precision Lightweight2, ensure your inlet pressure is within manufacturer specs (typically 18–25 PSI). Also check your compressor's CFM output-low air volume often mimics mechanical faults.
Next, inspect the cup vent. A blocked vent creates vacuum inside the cup, interrupting paint flow. Clean the vent hole thoroughly. This simple step solves more "mystery spitting" cases than you'd expect.
Loose connections are another overlooked cause. Check the fluid nozzle, air cap, and cup seal. Even a slight air leak can destabilize spray patterns. Tighten everything properly, but avoid overtightening which can damage threads.
Material viscosity also plays a role. If your paint is too thick, it won't atomize correctly. Always follow the TDS (Technical Data Sheet) and use a viscosity cup if necessary. Improper reduction is a frequent cause, especially when using a refinished spray gun for the first time after maintenance.
Cleaning habits matter. Residual paint buildup inside internal passages will eventually cause spitting. A thorough teardown and cleaning routine after every job is non-negotiable. Use dedicated cleaning kits and ensure all channels are clear.
Finally, check your air cap holes. Even partial blockage can distort airflow, causing uneven atomization. Soak and clean the cap carefully.
For consistent performance with a LVLP Spray Gun Precision Lightweight2, maintain a routine: inspect, clean, test spray. Spitting is rarely random-it's almost always a sign of something you can fix quickly with the right process.
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Wenzhou Sico Spraying Tech.Co.,Ltd
Add: Daqiao Industrial Area,Beibaixiang Town,Yueqing,Wenzhou,Zhejiang
Zip code:325603
Tel:+86-577-67307836
Email:sales@sicotools.com
Mobile/Wechat：+86-13777716892
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These SK-300 spray guns are fantastic! Love the no oring design, less leakage and easy maintenance. The atomization is perfect for automotive painting. Highly recommend!
Spiro Pittas,AustraliaPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-Paintz
