Conventional vs Electrostatic Paint Spray Guns - Graco Inc.

The Faraday cage effect can happen when spraying into corners or recessed areas with an electrostatic gun. Since charged paint spray is attracted to the grounded area closest to the applicator, the paint coats the part’s edges instead of going into the recessed area.

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To compensate for the Faraday cage effect:

• Some painters use a conventional gun to coat the recessed area and then use electrostatics to finish the rest of the part.
• Others reduce or turn off the voltage of their electrostatic applicators and increase the air pressure, allowing shaping air to direct the paint into the corner.

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