A spray gun should be inspected before every repair order, not only after it fails. I start by checking the cup seal, trigger movement, needle return, air cap threads, and fluid tip condition. A small air leak, dried coating around the nozzle, or a damaged needle tip can change the spray pattern enough to cause mottling, dry spray, or poor clearcoat texture. Preventive inspection takes minutes and saves hours of rework.
Before mixing material, pull the trigger with clean air and confirm that pressure stays stable under flow. Check the regulator, hose, filter, and quick couplers. Any restriction in the air path can reduce atomization during long passes on hoods, doors, and quarter panels. For a reliable lvlp spray gun Professional Automotive Tools routine, I always run a spray-out test after assembly. The fan must be even from top to bottom, without tailing, pulsing, or a heavy wet center.
Primer, sealer, basecoat, and clearcoat should not be treated the same during cleanup. Heavier materials can settle around the fluid passage and nozzle seat, while clearcoat can harden quickly around the cap. After each stage, empty the cup, flush the passage, and wipe the needle area. Remove the air cap and clean the horn holes with a soft brush. Never damage the air cap with hard steel tools; a scratched or enlarged hole can distort the fan permanently.
If the pattern spits, check for loose fluid tip, poor cup venting, damaged needle packing, or contamination in the passage. If the pattern is narrow or uneven, inspect the cap holes and confirm the fan control is not blocked. When using an air spray gun, do not immediately raise pressure to hide a defect. Higher pressure may increase overspray without solving the real issue. Diagnose mechanically first, then adjust pressure and fluid only after the gun is clean and assembled correctly.
At the end of the shift, flush the gun until the cleaner runs clear, dry the parts, and store the gun without leaving solvent trapped in seals. Lubricate moving points lightly if the manufacturer allows it. A clean gun gives predictable atomization, better transfer efficiency, and more consistent refinishing results across every job in the booth.
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
