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Old 07-30-2009, 05:15 PM
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can't spray k2 primer

ok i shot kirker perfect prime 2k urethane primer. both times it goes on very dry and is rough like sand paper , mostly the flat areas. i used 2 different guns , first time i thought it was lack of ventalation. so i moved to another shop that had exhaust fans so no over spray.
this time as soon as i started on the roof i saw the over spray was laying rough on the rest of the roof. i was useing a finishline regular gun not a hvlp.
there is something iam missing . when i shot the car with epoxy primer it layed down very nice and smooth, but it is only a 1 to 1 mix. this is a 4 to 1 mix so it is much heavyier paint.

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Old 07-30-2009, 05:38 PM
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What size tip was on the gun? What does the primer call for?
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Old 07-30-2009, 05:40 PM
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Sounds as thought your trying to spray with a 1.3 fluid tip. You should be using at least a 1.5 fluid tip, 1.6 would be the preferred. Also, you can reduce the mixture, 20 percent, further with reducer or thinner.
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Old 07-30-2009, 06:42 PM
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2K primer can come out a little dry with a 1.3mm or 1.4mm tip. It is hard to move enough material through those tips. The epoxy as you alluded to is much thinner and does well with those tips. My experience with using a 1.4mm tip with 2K primer is it starts off real good but as you progress the material starts to taper off and you get the dry effect.

Vince
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Old 07-30-2009, 06:46 PM
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ok , my first gun i used, i just looked at was a harbor freight 97855 heavy duty paint gun , it says comes with a 1.8 tip . iam not sure what the gun had in it i used today it belong to a friend.

kirker calls for a 1.4 to 1.8 tip at 40 to 50 psi.
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Old 07-30-2009, 07:01 PM
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Then you'll have to reduce your mix as recommend by manufacturer recommenations.

Perfect Prime
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Old 07-30-2009, 07:08 PM
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ok thanks for the replys , i knew i was just missing something. you put all that work and money into this stuff and then when you get to the end you get a mess.....
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Old 08-01-2009, 03:58 PM
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its not a mess buddy

just block with semi corse paper and start again

i use a 1.8 set up with primer


you realy have to mix it very very well .... i have now started mixing for prob 1-2 mins


check your tip size /needle/mix real well use a small amount of reducer to get it to spray out


you will get there it just takes time

stick in there



tommy
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