Minimizing 'Fingering' in Spray Patterns
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Airless Spraying Tips and Tricks | YOUR QUESTIONS ANSWERED!
What happens here
The quality and power of your pump directly impact the consistency of your spray pattern. 'Fingering,' which refers to an inconsistent or uneven spray pattern, often occurs when the pump struggles to maintain constant pressure. Inexpensive DIY pumps, typically found at home improvement stores, are generally not designed to spray thick coatings effectively. These pumps can experience 'dead banding' or 'hour-glassing,' where pressure fluctuates at the gun, resulting in inconsistent spray patterns. Professional-grade pumps with higher capacities (e.g., Titan 1140 vs. 440) are better equipped to handle thicker materials and longer periods of spraying, thus reducing the likelihood of fingering by maintaining stable pressure. Choosing a pump suited to the material's viscosity and the duration of work will help minimize this issue.
Goal: To avoid 'fingering' (inconsistent spray patterns), use a larger, higher-quality pump capable of maintaining consistent pressure, especially when spraying thick coatings. Inexpensive DIY pumps often struggle with pressure consistency, leading to uneven results.
Tools and materials
- Professional-grade Paint Sprayer
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