I would like to know, what size nozzle is good for shooting epoxy & basic primer. What would be the smallest, and what would be the right size tip to use.
I'll be using a HVLP gravity feed gun.
My experience using SPI Universal Clear, SPI, PCL and Eastwood brand Epoxy primer, SPI Urethane primer, EverCoat FeatherFill Polyester primer, and HOK Metallics
Epoxy unreduced 1.8, reduced 1.5, reduced to use as a sealer 1.4-1.5 so it can lay smooth as possible.
Polyester Primer 2.5, Polyester primer reduced 2.0 (heavily reduced)
Urethane Primer unreduced 1.8, reduced to use as sealer 1.5
Honestly youre going to sand it anyways. You could apply it with a roller brush! Haha. Id go 1.8. Common tip size. I use that for my primer. Unreduced. It wont lay it smooth like glass, but hardly any texture. A quick go over with some 600-800 grit wet sanded and youre golden. Just be careful sanding edges, youll eat em. I usually turn it too 30-35 psi. Does me good, regardless of what you use i wish you the best of luck!!!!
Thanks guy's.
Now I have another question, I am new at spraying primers. I am self teaching myself, with the help of people on here, who do it.
If I were to spray on one quart of normally mixed Polyester primer, How much Urethane would I have to spray, to get the same coating.
I ask because I would rather get a gun with a 1.8 - 2.0 tip, which from what you say here would be best for epoxy & Urethane, then to reduce Polyester down, or get a larger 2.5 tip gun.
Plus, which would leave a better (smoother) surface, a 1.8 or a 2.0 with the epoxy & Urethane. I know I have to sand both, but which would be liked more.
Once you get the hang of it the goal is to lay down the material wet and slick in order to minimize the sanding and do overs. Once the car has been blocked then from then on to completion there is very little sanding needed.. As far as tip size each material has its own sweet spot where the tip is just right sized.
I use a 1.4 for most of my stuff when I paint any more.. The 2.0 is used for heavy bodied material..
Yes, I agree about needing to learn to adjust the gun.
I am going to spray the epoxy primer, and then after I get the body work done, and re-epoxied, then I'll spray the finish primer on.
I won't get around to needing to think about spraying paint, for some time. I don't know if I would do, a good enough of a job for that. I will see how I feel about it after I do some spraying, but my thought is, to have someone go over my body work, and what I have Primed, and then paint it for me.
But I want to only buy one paint gun, for priming, and then a different gun later, if I do end up trying to paint it.
1.4 tip for SPI epoxy 1.8 urethane and the thicker stuff ,The smoothest finish will come from the 1.4 the bigger the tip the more texture you'll get.
Heres a pic of what SPI looks like out of a 1.4 ,the thicker the material the bigger the tip you'll need. I've never needed anything bigger than the 1.4 or never bought a primer gun either just used my old paint guns. my old Iwata with a 1.4 will still paint but not great so its used as a primer gun
Thanks guys,
I note everything, everyone tells me! I want to have the best chance going into this. I will practice on some scrap to get a good pattern, before I spray it on the car.
Thanks, Pat
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