paint booth
Gone but not forgotten.
Joined: Jul 2001
Posts: 6,521
Likes: 2
Originally Posted by Huntsman
Before you do all this, have you tried contacting some of the paint shops, auto dealers etc...they might rent you a booth for less than what all this will cost.
Dono
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
depending on where you live in the u s it is ilegal to paint cars without a permit or a spray both and you must have a license to paint but i have painted cars here no problem but if you do get caught it is a minimum 15,000 dollar fine and 30 days in jail
Elder User
Joined: Feb 2003
Posts: 586
Likes: 0
From: Tottenham Ontario Canada
I like the au naturel paint booth (outside). Let the grass grow long, get up really early in the morning when the grass is wet with heavy dew and the air is still. Roll the project onto the lawn, spray away & roll it back into the garage or shop to dry.
The dew will keep the bugs grounded and keep dust out of the air. The long grass will help prevent dirt being blown around by the gun and after it's mowed and bagged/raked, the overspray/evidence is gone.
It's quick and easy, but you have to be ready on the right morning.
If you do paint inside, there is one other precaution you need to take: Move the compressor out of the garage - it can potentially ignite the vapours.
Good luck with your project.
Cheers,
Eric
The dew will keep the bugs grounded and keep dust out of the air. The long grass will help prevent dirt being blown around by the gun and after it's mowed and bagged/raked, the overspray/evidence is gone.
It's quick and easy, but you have to be ready on the right morning.
If you do paint inside, there is one other precaution you need to take: Move the compressor out of the garage - it can potentially ignite the vapours.
Good luck with your project.
Cheers,
Eric
Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
To a couple of the guys here,,, it is suposed to suck the walls in for a paint booth. They do not pump fresh air in, they vaccuum the air out. There should be negative pressure on the booth. When making booths in small garages, or anywhere for that matter you want no neg pressure on the building and neg pressure on the booth. Let a lot of air into the building but limit it going into the booth so there is a suck on it. This keeps vapors in the booth part. I dont emember if I posted booth pics in the gallery here or not. If done right the comp can be in the building part and not in booth.
Junior User
Joined: Oct 2003
Posts: 61
Likes: 0
From: Colorado Frontrange
I just finished such a project 8' by12' made stud walls of 2 by2-attached these to the ceiling joists.lined it with 1/2" white foam sheeting duct taped the seams to seal it-6 4' flourescent fixtures on ceiling-with the white sheeting the reflectivity is incredible!!!-on one wall in the middle i cut a vent 16" square- got the good pleated furnace filters and taped them to the wall on the outside. on the opposite wall I cut the same size opening with 2 filters again that feed into a 16" flex ac type duct.mounted a fan in the window and attached said duct to same fan.taped the floor seam to seal that.With the fan on low it creates a nice gentle cross-flow with minimal outside air leakage-we checked with a smoke pot that beekeepers use and patched up a couple little leaks. this thing works great!! I checked into renting a booth and at $150 per day the cost savings justified the 200 I spent on the booth. Plus this way you are on your schedule and not theirs 
Senior User
Joined: Oct 2002
Posts: 230
Likes: 1
Originally Posted by ford390gashog
depending on where you live in the u s it is ilegal to paint cars without a permit or a spray both and you must have a license to paint but i have painted cars here no problem but if you do get caught it is a minimum 15,000 dollar fine and 30 days in jail
I also see not one person mentioned iso-cyanate poisoning....or *supplied air* respirators...
& paint booth are meant to operate with a POSITIVE pressure, not negative. The idea is that if there are any leaks you won't be sucking crap in to the *booth* to ruin the paint job.
Just rent a booth, it costs $150-200 a day & you can paint an entire car in 4 or 5 hours including sealer, base coat & clear coat. In less time than it takes to buy all the stuff to make a homemade booth & assemble it you could have painted 2 cars...& you won't have been poisoned...
Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
If it was positive pressure wouldnt it blow paint out of every crack? In a commercial booth the air is filtered on the intake and the fans are on the exhaust side. OSHA puts a manometer on the booth to see how much vaccum is pulled on the booth. When you are making these "plastic booths" a good measure is to see that it sucks the walls in some. You want to draw the vapors and fumes out,, you cant blow them out. Blow would make them go everywhere and not in the direction you want. Many booths are down draft to pull vapors thru a vent system in the floor to keep the dirt down.
Junior User
Joined: Mar 2004
Posts: 58
Likes: 0
From: behind you
zr61 sais it all,the main things are your health,quality of the paint job and the amount you will be spending.
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Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
http://www.ronjoseph.com/Q&A/spraybooth_design.htm
http://www.ronjoseph.com/Q&A/spraybooth_design_q8.htm
http://www.osha.gov/SLTC/autobody/do.../nioshctm.html
the first link is general, the second one some help and the third has some design pics. Some of this is quite technical. I was looking for one to tell the acceptable pressure differencial, it is eluded to but couldnt find something simple on one page. There is a meter usually used to tell when to change filters in a properly operating booth. Its metered inside of the booth compared to the outside of the booth compared to the inside of the building its in. The general rule however is, no negative pressure on building while maintaining neg pressure on the booth. I agree,, we didnt disuss the hazards of poinioning,, from several causes, not just from spray but from handling too.
http://www.ronjoseph.com/Q&A/spraybooth_design_q8.htm
http://www.osha.gov/SLTC/autobody/do.../nioshctm.html
the first link is general, the second one some help and the third has some design pics. Some of this is quite technical. I was looking for one to tell the acceptable pressure differencial, it is eluded to but couldnt find something simple on one page. There is a meter usually used to tell when to change filters in a properly operating booth. Its metered inside of the booth compared to the outside of the booth compared to the inside of the building its in. The general rule however is, no negative pressure on building while maintaining neg pressure on the booth. I agree,, we didnt disuss the hazards of poinioning,, from several causes, not just from spray but from handling too.
Senior User
Joined: Nov 2003
Posts: 435
Likes: 0
From: NW
Originally Posted by theonlybull
could have a booth like mine in less then 5 mins. check weather, move truck outside. spray....
Elder User
Joined: Jul 2002
Posts: 592
Likes: 0
From: BC, Canada
It's interesting if it is a negative pressure. That's contrary to control rooms in factories etc., which are controlled at a positive pressure relative to outside the booth. That keeps gasses etc. from entering the workplace.
Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
Yes, exactly opposite. My office in the shop is like a control room, I blow filtered air in. In a paint booth you want to evacuate the fumes and mist, you dont want to blow it out any cracks in the place. If you pressurized it the overspray would go everywhere, instead you want to suck it out thru the venting you design for it. Filtered air comes in under vaccuum in a booth. A central air heating system in a house is pressurized. You have to tape the joints, under pressure the air would not only come out of the registers but anywhere there was a leak.
Senior User
Joined: Oct 2002
Posts: 230
Likes: 1
Originally Posted by Sberry27
In a paint booth you want to evacuate the fumes and mist, you dont want to blow it out any cracks in the place. If you pressurized it the overspray would go everywhere, instead you want to suck it out thru the venting you design for it. Filtered air comes in under vaccuum in a booth.
Last edited by ZRX61; Jun 1, 2004 at 08:53 AM.
Tuned
Joined: Sep 2003
Posts: 483
Likes: 1
You might be right and I might be wrong, but show me where that is written. I can find dozens of pages on setting correct draft on booths, havnt seen one so far on setting pos pressure. Be glad to read it if you can find it.
Last edited by Sberry27; Jun 1, 2004 at 09:03 AM.