I know there is a lot of smart people on here and I need some help. I have painted my last airplane with SS and had no trouble. I love the paint. It worked perfectly. Now I am using it again and for some reason my Yellow gets a random fish eye. If I look really close the paint almost falls in places like the beginning of a fish eye. Like something is going wrong as it cures. They start to form around 5 minutes after shooting. I have been trying to solve this with the Stewarts factory for 2 months now.
When it happened I upgraded my filter system by adding a desiccant and a charcoal filter. Basically to eliminate the chance of water contamination. This is the system, as you can see air filtration should be covered.
I also changed my hoses from what I was painting with last time even though there was never an issue then. No change.
I then added a 50ft copper pipe coiled in a barrel of water to cool the air before it goes into the tank. Eliminates the chance of warm air at the gun which could condense at the tip and form water. Cold air filters better as well. Still no change.
This is the example. Around one every square foot.
I decided to shoot the black and got a perfect paint job. I have since painted all my black parts with no issues at all. So I sent the yellow paint to Stewarts. The Canadian distributor got a bit of the issue at a lesser scale when testing and the main branch cannot reproduce it all. They say the paint is fine.
So the last thing I tried was removing the paint filters on the intake side of the booth to see if that was it. (They are the proper sticky back filters) No change.
After keeping this quiet since mid November I really need to reach out to everyone for ideas. The factory cannot figure out what is causing it. I have red coming to me now to test which I shot on the last plane with no issues. I really hope that works. Then I just need to re shoot a few parts changing them to yellow. But why is the yellow doing this?
All testing was done on bar aluminum cleaned with thinner to rule out surface contamination. I live in the country not near a railway and have nothing silicone based in the garage. My gut feel is that maybe there is still some contamination in the air supply but I cannot figure out how. Yellow has the least amount of solids so maybe the slight contamination is only effecting it?
My compressor is a 60gal and at the bottom of the chart for what I should have. 11.5cfm at 90psi. It keeps up fine and worked just fine on the last paint job.
Can you think of something that I may have not tried?
When it happened I upgraded my filter system by adding a desiccant and a charcoal filter. Basically to eliminate the chance of water contamination. This is the system, as you can see air filtration should be covered.
I also changed my hoses from what I was painting with last time even though there was never an issue then. No change.
I then added a 50ft copper pipe coiled in a barrel of water to cool the air before it goes into the tank. Eliminates the chance of warm air at the gun which could condense at the tip and form water. Cold air filters better as well. Still no change.
This is the example. Around one every square foot.
I decided to shoot the black and got a perfect paint job. I have since painted all my black parts with no issues at all. So I sent the yellow paint to Stewarts. The Canadian distributor got a bit of the issue at a lesser scale when testing and the main branch cannot reproduce it all. They say the paint is fine.
So the last thing I tried was removing the paint filters on the intake side of the booth to see if that was it. (They are the proper sticky back filters) No change.
After keeping this quiet since mid November I really need to reach out to everyone for ideas. The factory cannot figure out what is causing it. I have red coming to me now to test which I shot on the last plane with no issues. I really hope that works. Then I just need to re shoot a few parts changing them to yellow. But why is the yellow doing this?
All testing was done on bar aluminum cleaned with thinner to rule out surface contamination. I live in the country not near a railway and have nothing silicone based in the garage. My gut feel is that maybe there is still some contamination in the air supply but I cannot figure out how. Yellow has the least amount of solids so maybe the slight contamination is only effecting it?
My compressor is a 60gal and at the bottom of the chart for what I should have. 11.5cfm at 90psi. It keeps up fine and worked just fine on the last paint job.
Can you think of something that I may have not tried?