Primer results, get me going better.
#1045367
08/01/11 09:47 PM
08/01/11 09:47 PM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
OP
super stock
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OP
super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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Ok, here we go. car is gonna be ready this weekend, (I hope) to shoot primer. Tell me whats wrong by the pic and or read extra info below. Tests shot the trunk lid. Here are the results. Problems: the one you can see, problem 2 ME (little painting experience), problem 3 the gun?. start with the equipment. Drip legs on the compressor, filter/water separator 50' downline of compressor, filter on the gun. The gun is an old craftsman, back in the day it was 200dollars, now it not even the available. The air caps are plastic and sized at 1.6 or 2.2 with a universal needle. Line regulator set at 90 psi gun regulator set at 27psi. Primer is autobahn high build black 2kprimer 5:1 with no call for reducer. 80* activator. Ok so I shoot once using the 5:1 mix and the paint came out in big globs badly could not get it smooth. So I quite got some reducer and mixed 5:1:1 in a small batch with the it shoot better but still small globs. Both of those were with the 1.6 tip. Tried the 2.2 tip but I could not get the fluid amount down at all so I went back to 1.6. Also tried bringing air pressure up to 35psi which seemed to help. Tried another small batch after I sanded down between shots; mixed another time at 5:1:1.5 in a slightly bigger batch and shot the top of the trunk lid. This was the best and got good coverage. The vertical surfaces shoot pretty good (the way I think it should) but the horizontal surface was grainy. And oh yah the skunk stripes I painted into it. Im really happy with the coverage but my painting skills leaves some to be desired. School me please. This pic is after I block sanded with 320, it feels smooth but looks like this. I think I was to far away on the horizontal and I was shooting at or a degree or two above activator rating.  Oh this is my pinky aprox 1/2" wide.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: Primer results, get me going better.
[Re: kilroy]
#1045370
08/01/11 10:09 PM
08/01/11 10:09 PM
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Joined: Nov 2003
Posts: 624
Modesto CA
BFASTER
mopar
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mopar
Joined: Nov 2003
Posts: 624
Modesto CA
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Seriously doubt its the gun; I had one and it was a great little primer gun. Does it look blotchy after you pour it into the gun? In other words, bumpy or somewhat textured? If it is coming out of the gun in blobs, then it is like that(blobs) while its inside the cup. Sounds like either bad primer, catalyst or non-compatible products. Try straining a very small amount and look to see if there are bumps in the strainer.
You could be too far away or be going too fast; its pretty easy to see if its going on wet or not. Put it on wet enough that it almost runs. That is lesson #1 when learning how to prime. Better a little too heavy than too light. Just allow ample time between coats for flashing of the solvents.....which could also be your problem! If you apply ANY material too much/too thick it will "solvent pop" leaving little pinholes/crates and sometimes bumps. I could go on but let me know if any of this helps so far.
Jim
1969 Dodge Super Bee Hardtop
2007 Nissan Altima 3.5SE
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Re: Primer results, get me going better.
[Re: BFASTER]
#1045372
08/01/11 10:20 PM
08/01/11 10:20 PM
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Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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30/40 PSI spray pressure,, mix is not thin enough open the spray pattern to get rid of the Zebra stripes thats opinion , and we all know about opinions.. 
I am truckless..
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Re: Primer results, get me going better.
[Re: BFASTER]
#1045373
08/01/11 10:34 PM
08/01/11 10:34 PM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
OP
super stock
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OP
super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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Quote:
Seriously doubt its the gun; I had one and it was a great little primer gun. Does it look blotchy after you pour it into the gun? In other words, bumpy or somewhat textured? If it is coming out of the gun in blobs, then it is like that(blobs) while its inside the cup. Sounds like either bad primer, catalyst or non-compatible products. Try straining a very small amount and look to see if there are bumps in the strainer.
You could be too far away or be going too fast; its pretty easy to see if its going on wet or not. Put it on wet enough that it almost runs. That is lesson #1 when learning how to prime. Better a little too heavy than too light. Just allow ample time between coats for flashing of the solvents.....which could also be your problem! If you apply ANY material too much/too thick it will "solvent pop" leaving little pinholes/crates and sometimes bumps. I could go on but let me know if any of this helps so far.
Jim
No the solvents look great, good and smooth, nothing in the strainer. Catalyst doesnt do anything funny when mixed. NO, lumpy wasnt correct term but Im no painter so forgive me. Im 99.999% sure it me but not for sure where.
Not really craters either, it just seems almost like dust but it was the primer.
Oh and what air cap would you use, since you have experience with the gun.
Last edited by kilroy; 08/01/11 10:45 PM.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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but as said before I dont know.
