Electrostatic painting is a way of spraying liquid paint so that the paint is pulled onto metal by electrical attraction. It is used to refinish metal items without removing them, which is why facilities teams use it on railings, lockers, doors and partitions.
The process, step by step
- Prep. The surface is cleaned, degreased and scuff sanded. Bare or rusted spots are primed. Surroundings are masked.
- Ground. The metal item is grounded so it carries the opposite charge to the paint.
- Charge and spray. The gun charges each paint particle as it leaves the tip.
- Wrap. Charged particles are drawn to the nearest grounded surface, including edges and the far side of round rails.
- Cure. The coating air cures. Many areas reopen the same day.
Why the wrap matters
With a brush or ordinary sprayer, the back of a handrail and the inside of a locker louver get thin coverage or none. Electrostatic attraction pulls paint into those places, so coverage is more even and edges hold up longer.
Why overspray is lower
Paint that would normally drift is pulled to the target. Less drift means less masking, less cleanup and less paint wasted. In an occupied building that is the difference between closing a floor and working around people.
What it works on
Steel, iron and aluminum respond best. Some laminates and other surfaces can be coated with the right primer. Wood and drywall are painted conventionally.
Limitations
- The item needs a good ground. Some coatings or isolated parts need extra prep.
- Prep still decides how long the finish lasts. Charge does not fix poor adhesion.
- Deep recesses, called Faraday cage areas, can be harder to reach and may need touch-up passes.
Planning a refinish? See electrostatic painting for what is included, or get a free estimate.
