How should I fix my screwup?

[locky]

SHot for the first time last night. I was using an HVLP gun with an in-line filter on my air hose. Shooting a 2K high build urethane primer. I think it went great. Looked good from what I could tell. So I prepped the next section and sprayed away. It was coming out a little blotchy at times. Then it would get good and then get weird again. After I was done I realized that I didn't have the filter in place. Today when I used the mini-die I disconnected it below the filter and plugged direct into the HVLP.
I am noticing a few bubbles due to the water in the air supply. Can I sand(grit?) those out tomorrow and respray, or is there a different approach I should be taking.
I won't do that again.....

[buguy]

That super sucks! I would sand off everything you think you sprayed that could have gotten water in it. Just because you dont see it bubbling yet doesnt mean it wont later. Use at least 120 grit. And be sure to strain the primer before spraying it.
But I really doubt that is the only thing you have going on here. Does your compressor put out enough cfm to run the gun you are using? HVLP guns tend to use tons of cfm to work properly. Not psi...but cfm. Also what size tip are you using. Typically HVLP guns are made to spray basecoats and will have a 1.3mm or 1.4mm tip, which is too small for primer. I like at least a 1.8 tip to spray primer...its just too heavy to spray through a small tip. If your HVLP gun has a 1.3mm or 1.4mm tip, I would go buy a cheap $20-$30 gun to spray primer with.

[locky]

Gun has a 1.5 tip. Sanded off the layer today. Luckily I am doing it in sections and there wasn't a lot to do. STill see a few bubbles and a couple of rough spots that the primer brought out. It's amazing how it can look good before you spray it. The primer really shows up the rough areas well. I am going to hit the rough areas with a flap and clean them up and then shoot it again with the air filter this time. Compressor is a Cambell Hausfield 5Gallon. I know it's a cheapo but for the price I have had it for about 4 years and it does the trick. A good one is the next on my tool list.

[buguy]

Yeah, if you really want to see whats going on, spray your primer, then spray a guide coat of black lightly over it, and start sanding. You will be amazed at how much of the black is left and how much is back to bare metal.

You may have better luck if you add or add more reducer to your primer. Should get better flow that way, but it will also lay on thinner and require more coats than normal.

Also, after sanding, be sure to wipe the car down with wax and grease remover before spraying the primer.

I agree, your 5 gallon compressor will do most jobs, but i can assure you, it will not put out enough cfm to spray an HVLP gun. You will learn this the hard way. Most HVLP guns require 10-20 cfm to work properly, and your is probly putting out 4-5 cfm.

[Tram]