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Old 05-25-2010, 07:40 PM
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Quick Question, Primer Orange PEEL



Purchase spi urethane primer regular
sprayed it with 1.7 hvlp titan gun.
ummm max psi is 20psi so i kept it at spec with needle trigger wide open.

when first applied the primer i was happy things turned out great,but right after i started to sand down the primer the image on top started to show, is this normal? what did i do wrong, is it a gun problem or a human noob problem, should i added reducer or should i just spray paint over it and hope the thickness of the paint will hide it =) ?

there are some area's where i actually took my time which created a mild run but the after effect of sanding down came out great compared to other spots.

a newbie in distress need guidance

thanks
mike

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Old 05-25-2010, 09:27 PM
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A 1.7 tip is too big. You shouldn't need anything bigger than a 1.4-1.5 and bump your air pressure up to closer to 28-30 psi. Too big of a tip and too low of pressure gave you major peel. Screw your fluid knob all the way IN then back it out 2 1/2 -3 turns. And see how that sprays. You need to sand that flat and if need be, re-prime. You will not get paint to HIDE that.
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Old 05-25-2010, 09:39 PM
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1.7 would be ideal for high build?

and if i was to use 1.7 for my spi urethane primer regular u think i would be fine if i turn up the pressure or just stay away from 1.7... the only reason why i used it because it was labeled primer gun hahahaha

1.4 would be fine?

i have 1.0 1.4 1.7 titan guns
1 harbor freight purple gun 1.4
1 optima 500i 1.4
1 iwata lph400 1.3
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Old 05-25-2010, 09:51 PM
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I use a 2.0 for SPI URETHANE REGULAR HI-BUILD, reduce it 5-10% and its lays out nice. That stuff is thick.
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Old 05-26-2010, 05:30 AM
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I have never shot THIS primer, but all other 2k primers can be shot with a 1.4 tip. I have a 2.0 primer gun that I shoot polyester primer with. Try reducing and use your gun, but I still think you need to bump up your air pressure. It will keep you from having to sand so much just to get the primer flat.

Last edited by Underground; 05-26-2010 at 07:26 AM.
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Old 05-26-2010, 05:41 AM
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i shoot my epoxy with a 2.3 . tip size has nothing to do with this. there is no gun other than an iwata that shoots at 20 to my knowledge. set pressure at 35 at the gun and go from there. you can dial down a 2.3 but you cant dial up a 1.4 .
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Old 05-26-2010, 07:24 AM
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Quote:
Originally Posted by shine
i shoot my epoxy with a 2.3 . you can dial down a 2.3 but you cant dial up a 1.4 .
I don't HAVE to shoot my primer that thick.
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Old 05-26-2010, 07:35 AM
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i use nothing but epoxy to resurface with and only do one coat at a time so i like it to be heavy.
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Old 05-26-2010, 08:31 AM
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Why do you only use epoxy?
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Old 05-26-2010, 10:15 AM
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Quote:
Originally Posted by Polish Painter
I use a 2.0 for SPI URETHANE REGULAR HI-BUILD, reduce it 5-10% and its lays out nice. That stuff is thick.
if you used a 2.0, can i use a 1.7 with the reducer added to it? would that help alot? With the orange peel plus with my 2 and 1/2 turn to the fluid tip and higher psi?

i have a 1.4 but i'm starting to guess if i'm a noob 1.4 would be safe to use for now until i get used to it?

many thanks

mike
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Old 05-26-2010, 10:40 AM
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Quote:
Originally Posted by Underground
I have never shot THIS primer, but all other 2k primers can be shot with a 1.4 tip. I have a 2.0 primer gun that I shoot polyester primer with. Try reducing and use your gun, but I still think you need to bump up your air pressure. It will keep you from having to sand so much just to get the primer flat.

THank you underground i will try that, but for future jobs are u talking abuot the sandable polyester primer? if so can i use my 1.7 to shoot that stuffs. i think i saw that polyester on a video wanted to try it one day...

http://www.youtube.com/watch?v=8ajCf...eature=related

thanks
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Old 05-26-2010, 03:41 PM
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Yes. I use the evercoat G2. Super thick. Add 10% acetone to reduce and get to spraying.not you wont be able to shoot it through a 1.7 . Go buy a cheap primer gun with a 2.0 tip or bigger. MAKE sure you only mix a cup at a time of polyester, because it will set up in 10 minutes or less in the gun. THEN you will have a mess on your hands.
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Old 05-26-2010, 03:48 PM
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I lay out the spi high build with my 2.0 sata very nicely at about 20lbs. Doesn't mean you'll be able to with a cheap one. You are going to have a bit of peel because you are building the surface. Object is too not have TOO much peel where its a bare to sand.
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