|Paint Booth Plans
have built and used many spray booths over the years, each with their own
good and bad points. With each new design I worked to build on the
good and eliminate the bad. And after almost a year using this one I
can honestly say I wouldn't change a thing. This is by far the best
spray booth I have used for large scale and small scale projects. It
was an easy afternoon project to build that I am sure everybody can handle.
Some of the materials are probably already laying your shop.
You can build this model any size you like. I
choose this size because I like a workspace opening wider than my shoulders
so I can rest my arms on the inlet opening and paint for hours without
feeling cramped. The size had little to do with the size of the fish I
paint most often. Even if I was only painting 8" fish all day I would
still opt for this size. Fish larger than the opening can still be
painted by working in front of the booth opening allowing the incoming wind
tunnel to draw the paint overspray into the booth.
I haven't taken the time to draw out line art drawing
of the design, I don't feel the project is complex enough to warrant
involved drawings and wiring schematics. I will explain the reasons
behind why I did things the way I did and provide some photos that should
get you well on your way to designing one like it for yourself.
A good spray booth has enough air flow to keep ahead
of the overspray buildup without creating a tornado effect in the work area
making it difficult to accurately spray paint. Trying to paint in a
wind tunnel is impossible. A good design also allows ample room to
rest your arms and work either inside the booth opening or outside. It
must also trap the contaminated swirling air untill it can be removed by the
blower inlets in all spraying conditions. Good lighting and easy to
clean surfaces are also a big plus. Dried paint particles build up
fast and can alter the performance of any paint booth over time.
Making it important to design a system that will not allow wet paint
particles to enter the blower blades or motor, often the demise for booths
built with an internal blower inlet close to the painting area. Most
of my early shop built booths failed because of overspray build up on the
blower blades causing the blower to spin off balance and over time ruin the
bearings. Air flow is also diminished when the blower blades become
covered in dried paint dust. So to eliminate this problem I built the
blower into a remote box above the spray booth and plumbed in the dirty air
via 4" plastic dust collector hose. Heavier paint particles are slowed
by gravity as they are drawn upward toward the blower box allowing the air
to pass by and dry the paint.
Choosing the right size blower is important, but not
as critical as using the right size hoses with my design. Using 4"
spiral dust collector hose to connect the blower box to the spray booth will
limit the volume of air entering the blower box no matter how large the
blower is. Using hose smaller than 4" will not allow enough air flow
to exhaust the booth and going larger will increase the airflow above what
is needed or desired. An earlier booth design I built used dual 6"
hoses and it proved to be too much air flow to paint around. The dual
4" hose set up is perfect.
I used a common home gas furnace blower. You can
purchase one inexpensively from most any furnace repair center.
The details of this paint booth are covered in my
Mastering the Basics - Tools and Equipment Course. As are many other
time saving tools not shown on this website.
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