Why am I creating dry primer dust as I spray?
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I was wondering if anyone knew why I created sort of a dust of what looks like dried primer when I use MP282 high build? Not over spray floating in the air, but right on the panel as I spray it.
To me, it looks like some of the primer is drying in the air on the way to the car. That small bit of dried primer gets constantly blown in front of me as I prime along. On the larger panels, the dust is very noticeable by the time I get to the end of the panel.
At the beginning of the job, before the dust has a change to accumulate, the primer always lays down very smooth. Once the dust thing starts to happen, the job gets a bit of texture to it. I normally don’t mind, it seems like I always have to sand the high build anyway, but if I could eliminate this issue, that would be pretty cool.
I’m using a devilbiss starting line primer gun with a 1.8 tip. I’ve inlet air from 30-55 PSI with no change. Fan setting doesn’t seem to affect the dust either.
It has been many years since I used that primer but I think there might be a slower hardener for it.Basically it was drying to fast,you could have added some slow or extra slow reducer or used a bigger tip and dropped your pressure down to about 25 psi,you don’t need any more that 30psi for primer.
Is there another filler primer you’d recommend?
If you have a DuPont jobber near and want an economical product, then I highly recommend Nason 421-17 (421-19). Very user friendly and good build
Bigger tip will help or reduce it more
Hb body 307 is some nice stuff
I use evercoat primers alot on resto
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