Grex Genesis.XSi3 ES Airbrush Set
GREX’s Genesis.XSi3 ES is a dual action gravity fed airbrush with an external cup that can be installed on either side of the brush. This set included a traditional top button trigger rather than a pistol style trigger.
The Essential Set comes with a 0.3 MM nozzle and a 7 ml side cup with lid, quick-fit magnetic nozzle, and needle. A magnetic cap snaps to the front of the brush to protect the exposed needle and can be removed for cleaning. The magnetic cap can also be stored on the back of the rear handle when not in use. A small wrench is also included.
The quick start guide offers tips for ways to hold the airbrush, how to install the quick fit needle caps, how to install cups and bottles, and how to seat the needle.
Brush Trigger Operation
The top button controls both the airflow and the amount of paint. Pushing down on the trigger starts the air flow and pulling back on the trigger starts the paint flow. As the trigger is pulled backward, the nozzle opening becomes larger and more paint is sprayed. A thumb screw on the back of the rear handle limits the distance the needle can be pulled back to control the amount of paint.
Spray Pattern Adjustment
The Grex operates like a typical dual-action airbrush. Fine lines can be created by holding the brush closer to the work surface. As the distance increases, the spray pattern also gets larger. The amount of paint should be less close to the work surface, and increased as the airbrush is moved away for a larger pattern. Also, the amount of air pressure is less when close to the work surface.
Airbrush in Use
I’ve been using the Grex airbrush for several months and have the following observations.
The first thing I noticed was the .03 nozzle of the Grex sprays a lot more paint than the .02 nozzle on my Badger Airbrush, obviously. This makes the Grex brush better for spraying larger areas rather than fine lines.
Due to the offset paint cup, the brush holds a lot of paint between the cup and the nozzle that needs to be emptied during cleaning. A side cup is not my favorite airbrush configuration, but that’s just a personal choice.
I had no significant problems with clogging of the airbrush during a wide variety of weather conditions, hot, cold, humid, or dry. This is a plus for the Grex Airbrush.
Cleaning the airbrush was fairly easy. I started by back-washing paint into the cup and dumping it, then wiping it. Several cups of the appropriate thinner were run through the airbrush working the trigger back and forth. When the brush blew clear thinner, I removed the needle and wiped it on paper towels.
With this cleaning process, I had no trouble with paint drying inside the brush and clogging the nozzle.
Overall, I think this airbrush works very well and has replaced my Badger for all but the finest detail work. The Grex Genesis cleans easily, and I had no problems with tip drying or dried paint in the airbrush.
Thanks to Grex for providing the review sample to IPMS/USA.

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