Bubbles in paint after drying?

Thinking it’s contaminated I did use laquer thinner before hand but it was dry can that still effect it

Solvent entrapment

Looks like CO2 entrapment caused by the HDI catalyst reacting with moisture, possibly from the compressed air source. You might want to pick up a desiccant dryer and see if that helps.
Edit:
Is the product you’re using a single component moisture cure urethane or non-MC 2K urethane?

Redux said:

Looks like CO2 entrapment caused by the HDI catalyst reacting with moisture, possibly from the compressed air source. You might want to pick up a desiccant dryer and see if that helps.
Edit:
Is the product you’re using a single component moisture cure urethane or non-MC 2K urethane?

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I am using MIL-DTL-64159B Type II 2K Waterborne Polyurethane CARC. Also what would you recommend for a desiccant dryer for a 165 psi 33 gallon compressor

Yawnza said:

I am using MIL-DTL-64159B Type II 2K Waterborne Polyurethane CARC. Also what would you recommend for a desiccant dryer for a 165 psi 33 gallon compressor

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It would be helpful to people here if you gave an intro to yourself regarding your background in the professional painting industry. It saves a lot of time/trouble if people know where to start given levels of experience. So maybe start here: New Member Introductions

You also FINALLY said what you're actually spraying. But still didn't give the primer info or even give the substrate. Looks like you're spraying onto some manner of synthetic ... something. Lots of variables and if people don't know about you then it's hard to know where to start.

Material I’m spraying is composite. primer is NCP280 I sprayed primer then sanded the primer then shot final

Yawnza said:

I am using MIL-DTL-64159B Type II 2K Waterborne Polyurethane CARC. Also what would you recommend for a desiccant dryer for a 165 psi 33 gallon compressor

Click to expand...

Any decent 3 stage unit should help, however with a 33 gallon tank you also might consider an aftercooler. It’s also important when storing the catalyst to spray argon or nitrogen into the container before resealing which will prevent atmospheric moisture contamination & CO2 gas. Another consideration is to allow the material to rest 10 minutes or longer after catalyzing which will allow the initial blast of CO2 to escape from the mix.

I don’t “spray paint “
But that could have been the substrate