Paint booth pos or neg pressure?

[OJ86]

I've all but given up on trying to get a 100% clean job at home. I swear when I did this shit for a living I would walk from the sanding area, blow myself off real quick and run into the booth and have clean jobs.

At home. I can clean, clean, clean, shower, pray, clean some more.... and I will always get trash. I have intake and exhaust fans....Looking back I got cleaner jobs out of my old 1.5 car paint shack that had an exhaust fan and a bunch of roof vents I added for air to be pulled in.

 

[RosharonRooster]

Even expensive booths get debris. It's the nature of the business.

I've actually never been inside a real paint booth. I have a "professional " come by the house one time to help me out and I pointed out some dust and nibs and he said "man that's nothing. I get way worse in my booth"....after hearing that, I'm not that hard on myself anymore.

 

[Nochain]

Well I don’t know anyone or any companies that would let me shoot in their booths. It’s not like the old days. So its either do it in your garage or pay to have it done.

 

['68 Coronet R/T]

I've actually never been inside a real paint booth. I have a "professional " come by the house one time to help me out and I pointed out some dust and nibs and he said "man that's nothing. I get way worse in my booth"....after hearing that, I'm not that hard on myself anymore.

I was in a $100k professional booth back when I taking classes and working on my signature car.

The owner had us stand in there while he sprayed some paint on a door sitting horizontal on a stand. The airflow was incredibly strong and the over spray could be seen coming out of the gun and immediately being sucked down around the panel and into the floor vent.

He said you could literally paint different color panels in the booth at the same time with no risk of contaminating them.

They shut the fans off and turned the heat on while we were in the booth and it quickly became unbearable.

Later, I saw a guy spraying in the booth with no mask on. The owner told me he was a salesman for one of the paint suppliers and that he would never recommend spraying without a mask.

 

[Nochain]

I was in a $100k professional booth back when I taking classes and working on my signature car.

The owner had us stand in there while he sprayed some paint on a door sitting horizontal on a stand. The airflow was incredibly strong and the over spray could be seen coming out of the gun and immediately being sucked down around the panel and into the floor vent.

He said you could literally paint different color panels in the booth at the same time with no risk of contaminating them.

They shut the fans off and turned the heat on while we were in the booth and it quickly became unbearable.

Later, I saw a guy spraying in the booth with no mask on. The owner told me he was a salesman for one of the paint suppliers and that he would never recommend spraying without a mask.

I’ve seen similar. It’s important to see WTF your spraying in order not to miss anything while flowing the paint over the panel especially with clear where there is significant atomization. But I understand that we all do the best with what we have. We adapt and do what we can.

 

[95maxrider]

I'm glad this thread is already going so I don't have to start my own. I'm in the planning stages of setting up my home paint booth and am trying to nail down my intake/exhaust setup. I'll be working in the area basically the size of a one car garage, with a normal door on one wall and the garage door on one adjacent. My plan was to buy a cheap/temporary door and cut a hole in it that I could stick the single intake box fan into, probably towards the top. Then build a wood frame to hold two box fans for the exhaust that will go under the garage door. So one in, two out in and as much of a down draft as I can get. Does this generally sound about right?

Funny story about paint booths- We had the door repainted on my wife's car two years ago at a very good local shop. They tried to give it back to me with dirt nibs all over the place, and at least one big run. The owner was very nice to work with and had it all fixed up and was telling me about how he just spent 100k on a new booth and was having all sorts of trouble with debris getting in the paint. I couldn't help but think back to the rattle can job I did on the quarter panel on my beater in my garage and I didn't have a single dirt nib or run on the job. I've heard some people say those nibs are all from a lack of prep and almost never get in during the spraying process. How much truth is there to that?