FAQs

What is the difference between having a three-row pit vs. a one-row pit in my automotive paint booth?

What is the difference between having a three-row pit vs. a one-row pit in my automotive paint booth?

Three-row exhaust pits are most useful for painting parts off a vehicle in an automotive paint booth. The wider the pit, the wider the spray zone. Three-row pits feature a four-part system that is designed to evenly draw air out of a paint booth, while capturing […]

What is the relationship between paint booth air velocity and paint gun pressure?

What is the relationship between paint booth air velocity and paint gun pressure?

Is there a rule of thumb or formula to determine or calculate spray booth air supply velocity w.r.t. the amount of paint required for a particular part? Paint booth air velocity and paint gun pressure are independent of each other. Paint companies want 80 to […]

Which airflow style creates the cleanest paint job?

Which airflow style creates the cleanest paint job?

Pressurized downdraft airflow provides the cleanest paint jobs in a spray booth.

Pressurized paint booths keep the cabin of the spray booth at a positive pressure, so no outside contaminants can make their way through a leaky seam or seal for dirt or dust to enter.

Downdraft airflow does an excellent job controlling overspray and contamination. Air enters the booth through a filtered ceiling plenum and flows vertically over the product and into the filtered exhaust pit in the floor.

Semi-downdraft and crossdraft airflows are not as conducive to achieving the cleanest paint jobs, as drips and overspray can contaminate components down the airstream. With these airflow styles, it is crucial to select the right reducer to optimize paint flow resulting in even, professional coats.

If you are painting something large, like a truck, would overspray on the trail side of the air cause problems?

If you are painting something large, like a truck, would overspray on the trail side of the air cause problems?

Potentially, yes. A lot of large equipment businesses have switched to downdraft booths for that reason, as long as the product does not require the bottom to be painted. If you are having problems with overspray trailing off and ending up at the backside of […]

What is the best way to control relative humidity in paint applications?

What is the best way to control relative humidity in paint applications?

This depends on what you are spraying and the surface you are spraying on. There are a lot of waterborne paints that require low humidity to dry out the air and help them dry faster. It is best to reference the technical data sheet of […]

Should you use tact-based coat before using clear?

Should you use tact-based coat before using clear?

Yes, for the most part. However, there are always exceptions. For instance, if you spray a fine mist as your last coat of base (seen with some waterborne paints in automotive refinish), tacking it could remove it. If you are spraying basecoat, you want to tack off between that with a high-quality sticky cloth with less fibers. This will remove overspray, dry spray and any other potential contaminants.

What is the worst contamination/dirt scenario you have seen in a paint booth?

What is the worst contamination/dirt scenario you have seen in a paint booth?

We have seen a full range of paint booth contamination scenarios. Typically, when businesses put in new equipment, they also change a lot of other things in the shop, which can result in contamination in the spray booth. For example, one shop we worked with […]

How often do you see external factors affect the paint job?

How often do you see external factors affect the paint job?

We see it quite often in the industrial realm, since many people use open front paint spray booths, which pull air from the shop environment, or even from outside. This can often introduce contaminants into the paint booth. There are a lot of things to […]

What is your recommendation for filters in an open-front spray booth when using CARC paint?

What is your recommendation for filters in an open-front spray booth when using CARC paint?

We recommend GFS Wave® exhaust paint booth filters from Global Finishing Solutions®. They are polyester filters with a large surface volume. The ridges or “waves” on the filter media capture and retain overspray, acting as a 3D loading system. Flat exhaust filters get clogged very fast, but with GFS Wave filters, overspray works its way down the ridges more slowly. Because open-front spray booths do not have intake filtration, the exhaust filters clog much quicker. Using a quality filter like GFS Wave provides exceptional depth loading for a longer filter life.

Is there specific guidance where a particular zone starts, or is the whole booth regarded as one zone?

Is there specific guidance where a particular zone starts, or is the whole booth regarded as one zone?

We are a joinery company and have a booth with a 3.0m wide dry back extract for lacquer finishing. Our insurance company has raised concerns regarding the zoning within the room. In both the US and Europe the interior volume of a spray booth is […]