Is it better to paint against the draft or with it?

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PostPosted: Tue Nov 28, 2017 6:30 pm
I watched a video where the painters suggested to paint against the draft. His reasoning was that the overspray would settle on top of the fresh paint or clear and melt into it. He said if you paint with the draft the overspray settles on the panel and then you paint on top of it possibly creating adhesion problems. Is there any truth to this? What's the best practice for painting in a cross draft booth?

Thanks for your thoughts.

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PostPosted: Tue Nov 28, 2017 8:52 pm
I paint with the draft but honestly if you are getting heavy over spray on any panels, your booth is not pushing enough air.
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PostPosted: Tue Nov 28, 2017 9:11 pm
i paint against the draft. he is correct, if youre in a situation over spray is settling it will cause adhesion problems but another answer to your problem is use a step slower reducer and do lighter coats moving faster around the car getting it wet faster.
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PostPosted: Wed Nov 29, 2017 1:03 pm
Painter Dave
You work out of a very Hi dollar Paint Booth much more expensive than mine, I can't imagine your booth having any more of a draft than mine?
I would expect your's performs way better than My semi cross draft that produces very little to no discernible draft.
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PostPosted: Wed Nov 29, 2017 4:23 pm
Doright wrote:Painter Dave
You work out of a very Hi dollar Paint Booth much more expensive than mine, I can't imagine your booth having any more of a draft than mine?
I would expect your's performs way better than My semi cross draft that produces very little to no discernible draft.



i have 3 booths one of them is a side down draft, very expensive custom built, air conditioned and heated i dont have problems with that booth,

another booth is semi down cross draft and dont have problems there either,

third is a primer booth full cross draft

but i do paint in garages for people that hire me to come spray their car after they get it ready,

im also hired by other shops once in a while to paint other cars their painters are not qualified to paint. i spay in some crappy booths and some good ones, i grew up painting in my garage so i know the struggles and im good at getting around them
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PostPosted: Wed Nov 29, 2017 7:00 pm
Ha, ha! I have 3 booths in one! Air comes in one end and goes out at the top and bottom of the garage door. So cross draft, down draft and up draft all working together. :flatten:

Seriously though, I can see the over spray leave the gun and head toward the floor and out under the door.

Guess I never really gave the with or against the draft any thought. Have never had a problem with over spray on a panel though.
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PostPosted: Thu Nov 30, 2017 6:49 am
What I'm getting is the light dust that settles on the panel after it the overspray dries in the air and then falls to the panel. It tachs off just fine and the finish on the car is fine since it's pretty muched flashed before the dust falls on it. For primer it hasn't been a big deal because I can tach between coats but just worried about the clear since everything I've read says not to tach clear between coats. I"m going to add two more blower motors to speed up the air flow and see what that does.

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PostPosted: Thu Nov 30, 2017 8:24 am
Lenny B wrote:What I'm getting is the light dust that settles on the panel after it the overspray dries in the air and then falls to the panel. It tachs off just fine and the finish on the car is fine since it's pretty muched flashed before the dust falls on it. For primer it hasn't been a big deal because I can tach between coats but just worried about the clear since everything I've read says not to tach clear between coats. I"m going to add two more blower motors to speed up the air flow and see what that does.



Lenny slow down your reducer, even in a garage you should be pulling very little color off your tack rag
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PostPosted: Thu Nov 30, 2017 9:03 am
:goodpost: :goodpost:

I only use slow activator and slow reducer even when temps are 65-70 degrees in the booth.
The trick is to watch the paint as it flashes off so you know when you have waited long enough before applying another coat.

The other thing I noticed is that cheaper paint lines tend to leave more dust in the air. Tried the Limco Supreme Plus line when painting the '67 Jeep CJ5 bright red and although it covered well and sprayed okay, I had red dust everywhere.

I am using ********** Dark Red on the '62 Chevy and have no dust. Also, using the Motobase LV line, ProSpray, Diamont, etc. have never produced dust like the Limco did.
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PostPosted: Thu Nov 30, 2017 9:11 am
your paint should still be wet when youre done. then go grab a stool or read a newspaper and let the flash time do its thing
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