Spraying in the Paint Booth

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 […]

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 […]

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 the proper way to get an even finish when painting a metallic hood without getting the stripe effect when applying the clearcoat?

What is the proper way to get an even finish when painting a metallic hood without getting the stripe effect when applying the clearcoat?

Finish Application If the stripping is happening only after you start applying the clear coat it is possible that the basecoat is not completely flashed off when the clear in applied. This can cause the metallic to shift. Another possibility is that the basecoat has […]

What are the potential hazards when painting with the doors open?

What are the potential hazards when painting with the doors open?

“We are using a spray gun between 20-60 psi when the production doors are open on the unit. Do the filters on the doors provide a significant protection factor when dealing with Isocyanates?” The paint booth should have the doors closed during paint spraying. The […]

How do I maintain a specific spray temperature inside the paint booth?

How do I maintain a specific spray temperature inside the paint booth?

I live in Malaysia with the temperature of 32 degree Celsius, how do I maintain the spray temperature of 23 degrees Celsius inside the painting booth? Do I need to install a chiller and humidifier? Due to the conditions in Malaysia the temperature set-point being […]