Question about Imron 3.5

Painter123

New User
I have painted some metal panels with imron 3.5. Had some issues (tiny bubbles). Sanded down after a few days and repainted, but am getting scratches show through cause I didn't sand enough.

My question is, do I need to remove the Imron completely or can I spray over the imron 3.5 with 2 part epoxy primer after sanding.. I would.like to end up with a smooth base to start over.

Thanks.
 
I am no expert here, but have painted a
few things with Imron. I would remove all
the color before repriming it. Espically
if it's not a Axalta/Imron compatible
product. It's great stuff but very picky
about how you use it. If you have any
questions there is a tech line for axalta
on there website.
 

Did you use a primer surfacer? If you are looking for an automotive smooth finish you probably should. If it is a small project SEM makes a very good one.
 

If you want to shortcut it you can usually spray surfacer over scuffed and cured topcoats to fill scratches, sand smooth, and then re-topcoat. Lots of cars going up and down the road have layers of primer over topcoats mixed in and I doubt you can pick them out.

Refer to Imron tech sheets to make sure they allow it, and stay safe with this stuff!
 

Thanks for the help. I sanded down some of the panels and reprised and removed paint and primer from 2 of the panels and primed all with 2 part epoxy primer. 8m having problems with solvent pop with the primer and the imron. If I paint it on very thin the pop goes away, but then the surface is dull. If I spray on enough to get some gloss, then I get solvent pop all over. I think it is called solvent pop, very tiny needle like protrusions. I will be dilute the imron tomorrow and see if this helps.
 
(quoted from post at 22:23:18 10/05/19)
Thanks for the help. I sanded down some of the panels and reprised and removed paint and primer from 2 of the panels and primed all with 2 part epoxy primer. 8m having problems with solvent pop with the primer and the imron. If I paint it on very thin the pop goes away, but then the surface is dull. If I spray on enough to get some gloss, then I get solvent pop all over. I think it is called solvent pop, very tiny needle like protrusions. I will be dilute the imron tomorrow and see if this helps.

The way you describe that it might be fisheyes. Sounds like surface contamination possibly.what are you wiping down with and how?
 
(quoted from post at 06:23:01 10/06/19)
(quoted from post at 22:23:18 10/05/19)

The way you describe that it might be fisheyes. Sounds like surface contamination possibly.what are you wiping down with and how?

I'm wiping down with gun wash or wax and grease remover.
The surface looks like tiny needles poking upwards from under the surface, but not breaking the surface. Then I use a tac rag just before painting to remove any dust.
 

I was painting this summer at 35deg celcius in the shop and had no issues. Now it is 20deg Celsius. Would this be causing this issue?
 
How close is your air regulator/water separator to the compressor? If its close to the compressor it can cause water problems.
 
I would think it not solvent pop . It sounds like fish eyes to me or possibly water in the lines. Your regulator/water separator should be at least 25 feet from your compressor.
 

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