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Downdraft paint booth
Hello all. I am looking for information I saw regarding building a small downdraft paint booth with chicken wire on top. It used HVAC filters avaliable at a hardware store. thanks
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Booth
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An old aluminum window screen works great as a spray surface, too, and small parts won't fall through.
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This is the downdraft table I built. It has worked well for me.
![]() It is a 2x4 frame wrapped with a blue tarp. The top is plastic mesh fencing. The ends have 20 inch box fans with furnace fans duct taped over them. It has the advantage of being easy to take down and store when not in use. |
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I used a shortened fuselage shipping crate. Wire mesh on top, a furnace filter and 20" box fan screwed to the bottom. I used the cut out piece from the fan opening spaces off the floor of the box with short pieces of 2x4 to keep some of the spray out of the filter. It worked pretty well.
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Exhaust
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My plan
My plan is to build a simple 4' x 2'x 2' box out of 1" pvc and 6 mil plastic tarp. I will use a 20 " box fan from walmart and hpa furnace filter. I plan to suck air down when priming then flip the fan around and blow air up thru the grate ( and filter) when drying to keep the bugs off, if needed. This will be for primer only. And i hear primer drys pretty fast. I was going to make the front to back pvc pipes removable so that i can break it down to store.
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Quote: They are exhausf fans. I suggest intrinsically safe or squirrel cage. If you use box fans, use them to blow so volitile fumes are not passing through them.
I should have mentioned, I used Stewart Systems water based primer exclusively. No worries on flammability. Without the fans on, overspray will come back up through the mesh contaminating the shop. |
Here is mine:
http://www.brunbergs.net/?p=296 http://www.brunbergs.net/?p=318 It's mostly good for small parts. You probably want a bigger surface like the 2x4 frame shown in another post above. |
What about side 2?
All of this makes good sense to me but I'm a little slow....
After painting/priming side one, do the parts get flipped to allow for the opposite side to be painted/primed? Are they allowed to dry and then flipped and painted/primed? |
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For external skins I only primed the internal side. I also chose to not prime the exposed side of the floor panels since they will be covered with carpet. |
I used mine with both Stewart systems waterborne primer and Shopline epoxy primer. Both of them dried in only a couple of minutes with the downdraft, quickly enough that I could flip them over and paint both sides
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Never thought of that
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If you are careful, gently flipping the parts over after 5 minutes or so is easy and lets you prime both sides with one load of the paint gun. |
Small parts paint booth
Thanks all for great ideas. Will put one together soon
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