Single Stage problems

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PostPosted: Fri Oct 16, 2020 8:52 pm
Lets see if this image thing works

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PostPosted: Fri Oct 16, 2020 10:36 pm
aside from the trash, the spots that go down to the primer are fish eyes caused from some kind of contamination. it looks like its on the project and not in the product or your equipment. i say this because if it was in your product or equipment it would most likely be all over, not just a speck here and there. in the one picture the fish eye looks like it goes all the way down past the primer. the only way to cure the problem on the project is to strip it all off and start over, making sure everything is squeaky clean. as talked about before these can be frustratingly hard to figure out. take your time and analyze each step you take from the time you open the can of paint, you'll find something you did wrong. like the rags i used were they CLEAN and not use on anything else.
Jay D.
they say my name is Jay



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PostPosted: Fri Oct 16, 2020 11:10 pm
So you can see the pics? I can't lol.

They don't go through the primer though... when I do just primer or base there is no fisheyes at all. That is the seriously strange part of this!

Would shooting paint inside of a air vented cardboard box cause a silicone build up? that is the only thing I changed when shooting the SS was I grabbed a huge cardboard box and made a booth.

BTW it is all over... I couldn't get a picture of a whole surface... just wasn't possible. The spots cover the entire piece in some areas



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PostPosted: Sat Oct 17, 2020 11:58 am
yep i can i right click then click ( open in new tab) then it pops up in my tool bar and i click there to open it, not the normal way to have to do it though. NORMALLY if the problem is in your product or equipment the fish eyes will be constant like 5-6 in a square inch and sizes relatively uniform. NOTE i said normally!
Jay D.
they say my name is Jay



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PostPosted: Sat Oct 17, 2020 2:44 pm
I did what the paint store said, and bought some sealer also by Nason.

I applied the Nason select seal 2k as per directions... and that went on with no problems at all seemingly... just what I did not scuff through in terms of holes and fisheyes.

same problem again:

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I am kinda miffed... the heck is going on. I can only think of a couple things:

The air hose going from my compressor to my copper is an older hose... could have oil in it? It looked very good when I cut some open, going to buy brand new hose today.

I use a plastic syringe to pull the paint out of the can so I don't make a mess... used the same syringe many times... something in there? But why not on other paints?

cardboard box throwing crap on the piece?

This is driving me nuts!

Thanks everyone



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PostPosted: Sat Oct 17, 2020 6:10 pm
fisheyes can come from contaminated dirt getting on your project which you have plenty of. if i were you i would start using a tack rag. I've used them for over 40 years and never had a problem. buy them at an autobody jobber not the local hardware store.
Jay D.
they say my name is Jay



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PostPosted: Sat Oct 17, 2020 6:21 pm
I will try that next, thank you.

I would be super happy to discover it is just foreign crap falling into the piece. I just changed my air lines to be safe today.

Also picked up a leftover 8oz can of the same brand single stage in a different color... I think if I spray that and the problem cures then that would be interesting.



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PostPosted: Sun Oct 18, 2020 10:43 am
glytch5 wrote:Hi there. This is my first post on this forum.

I am fairly new to spray gun painting (done plenty of rattle can work!) but have spent the summer spending my hard earned cash on my air system, and air purifying system and some equipment I am comfortable with.

My problem is spraying single stage paint only... I seem to be littered with fisheyes! However this is ONLY happening with my SS paint.



Please post pics of your air compressor and air filter system.
Your last post says you got a New air hose this wont do any good if your compressor is making oil unless you have an Oil trap in your air filter system b4 the air hose.

A few of the pics are clear, fish eyes go down to your Primer like Bad6 says could be anything on the Primer even a Human finger print can be the cause! your skin has Oils in it. Always wash with a Good soap that Rinses clean! Rinse water should sheet not break.

Tack Rags should be gently dragged across pieces being painted Not hard but very gently not to leave traces of Waxes used in the tack rag.

Using cheap syringes can have Silicons lubricants in them around plunger. Never use them myself.
Never use elcheapo cups or cans from Hardware stores as they can have coatings in them that cause contamination issues.

Check compressor Tank for oil when draining water from it, Catch the water in a clear cup let it settle for a while and check. oil will float on top.

Use a Desiccant snake at base of gun.
https://www.summitracing.com/parts/dvr- ... gLyu_D_BwE
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



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PostPosted: Sun Oct 18, 2020 10:24 pm
I am using this after about 20 feet of rubber hose, then another 20 ish of copper tubing with a U shaped trap:

https://www.amazon.com/gp/product/B01JN ... UTF8&psc=1

then another 30 feet of hose out the gun with another filter there. I have used a desiccant, a standard water separator and now experimenting with motorguard orange ball filters.

It is quite hard to catch the water since the drain is at the base of the standing tank, but that is a good idea. The water is colored but I think that is from light corrosion. Looks more like rust than oil.. but I have also never put it in a glass.

I do use cups from my autobody store. My air is totally dry from water at least from what I can tell. Honestly if its in my lines... I have no clue how to fix it.

Also again though... why is this only happening with SS paint and not all my sealers, epoxys and base paints?



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PostPosted: Sun Oct 18, 2020 11:02 pm
front end of my air dryer setup-hose hooks up to this before going out to the gun:

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