rdransman
Promoted Users
I know it flashes earlier, but I wait the full 30 minutes to let it out-gas. I figure it helps to guard against solvent pop. Then again, I'm a hobbyist, never on the clock or in a hurry.
spray Universal clear in Non- baking paint booth.
- Thread starter RayH
- Start date
dhutton01
Backyard Hack
I think 30 minutes gives margin to insure no problems. And don’t forget Jim C lives a charmed life….
Chris_Hamilton
Trying to be the best me, I can be
Nothing wrong with waiting 30 minutes. If you are in a production environment then you go as soon as the clear doesn't string, but if not then 30 minutes is good practice to do so.
Stuff I'm doing these days I always defer to what Barry said to do. Especially when using his products.
As for turning the booth off between coats, like I said above it's going to be most helpful if your booth pulls too much air. Most don't. Usually the ones that do are unregulated professional style booths with 36 inch or larger fans. Started work at a Shop once with a Devilbiss booth that was running wide open all the time. Owner was complaining about everything having die back and some with solvent pop. First thing I did was turn off between coats until I could get a VFD. Once I got the VFD I ended up with a setting of 32% (of max). Once I did that the issues disappeared and you didn't necessarily have to turn off between coats. Unless you know you have too much air moving through (think roaring) then it's probably not going to make a lot of difference, although it's not going to hurt anything doing so.
Stuff I'm doing these days I always defer to what Barry said to do. Especially when using his products.
As for turning the booth off between coats, like I said above it's going to be most helpful if your booth pulls too much air. Most don't. Usually the ones that do are unregulated professional style booths with 36 inch or larger fans. Started work at a Shop once with a Devilbiss booth that was running wide open all the time. Owner was complaining about everything having die back and some with solvent pop. First thing I did was turn off between coats until I could get a VFD. Once I got the VFD I ended up with a setting of 32% (of max). Once I did that the issues disappeared and you didn't necessarily have to turn off between coats. Unless you know you have too much air moving through (think roaring) then it's probably not going to make a lot of difference, although it's not going to hurt anything doing so.
crashtech
Combo Man & Mod
I've been fighting that with Euro for a while now.
Chris_Hamilton
Trying to be the best me, I can be
I seem to recall Barry saying that turning up your air pressure some will help if you are experiencing that. I know that he addressed that at one time on here.
Chris_Hamilton
Trying to be the best me, I can be
Iso clumping?
Where to go from here? Moisture pimples
Hello everyone, I am a novice first time painter. Painting my little Datsun in my garage. I painted the car with 2 coats or so of SPI base, got dirt in it, wet sanded the dirt out with 800 grit, and did 2 more coats of SPI basecoat this time with the fan off, waited till the next day, then...
www.spiuserforum.com
When I think iso clumping I think pimples that you can feel. When I describe micro popping I would say its more of very small pin holes mostly on the horizontal surfaces.
I did deal with some iso clumping a few weeks back when shooting some satin black(not spi) a few weeks back. I think it was from some old hardener I used. I was being cheap and noticed I had some left over from the previous batch and not realizing that the stuff was over 2 years old.
When I reshot the parts with the same can of satin black, but the new hardener I had no issues. Lesson learned.
I did deal with some iso clumping a few weeks back when shooting some satin black(not spi) a few weeks back. I think it was from some old hardener I used. I was being cheap and noticed I had some left over from the previous batch and not realizing that the stuff was over 2 years old.
When I reshot the parts with the same can of satin black, but the new hardener I had no issues. Lesson learned.
crashtech
Combo Man & Mod
I don't think so, when it happens it has all the classic signs of solvent pop, just very tiny and appearing well after the last coat, typically only on horizontal surfaces and/or where I'm a little bit heavy-handed. it always buffs right out. I think I might have a little moisture in my air even with the big desiccant in the booth. I've been needing to use slower than usual reducer to avoid it.
Whitesnake
Newbie
I agree having a variable fan and controller is nice. I don’t wanna feel like I’m painting in a wind tunnel. I want as little as possible while still being able to see what I’m doing. Too much air just creates problems in many ways.