This is happening intermittently, sometimes days after applying the first coat of duratec sunshield to parts. The duratec was sprayed on, then brushed in to fill some voids. After a few minutes flash time it was placed in an oven at about 140F to cure for a few hours. The following day, it was block sanded and coated again. The guy doing it didn't notice the porosity until I pointed it out, so I can't say for sure when it appeared exactly, but it looks to me like the first layer was still out-gassing while the next coat was applied. Putting it in the oven to cure the second coat probably exacerbated the problem. I suppose our recourse at this point would be to oven cure the first coat 24 hours or so before moving on, and we can be a bit speedier with the later coats. The duratec was not thinned or modified in any way. Any thoughts or experience with what's going on here?

That looks like a layup issue with air in the fabric and not the duratec.