Primer Help

[Corvair Chris]

I've seen the answer some where before but I can't remember what it was. I'm shooting a 1k primer surfacer (omni MP181) with an HVLP gun with 1.8mm needle, I'm getting white fiberous material coming out of my gun. What is causing this, is is wrong ratio of primer to reducer, incorrect air pressure or what?

Thanks
Corvair Chris

[Roch_Greg]

I've never shot that material but have shot (mistakenly mind you) material that was either mixed improperly or at the wrong PSI. In both cases it didn't cause the material to come out a different color than what was in the cup.

When was the list time you broke your gun down and cleaned it?

Greg

[Corvair Chris]

Greg,

I guess I was not as clear as I thought I was about my question. I'm not saying that I'm getting a different color out of the gun but rather long stringy fibers that float in the air and land on the panel leaving a very rough surface.

I always break the gun down and clean it after each use. This gun has only been use to shoot this primer so no color transfer from the gun.




Corvair Chris

[56Ford]

Make sure your primer is stirred very well.

Once you do that spray out a small panel and check it.

The primer may be bad.

[lbell101]

I used to get that with lacquer primer if it wasn't reduced enough.
Try a little more reduction.

Larry

[Len]

I agree with Larry, if it's lacquer it may need a lot of thinner to get it to spray. Sometimes you need as much thinner as you do primer. You usually want to to WET the surface and not be rough and dry. The wetter the primer is when it hits the better it will stick.

[56Ford]

Most of the old 1K primers i've used use a 1:1 ratio.


I had almost forgotten about lacquer primer it's been so long since I've used it.