New Paint Spray Has Craters
If they are about the size of a quarter you are probably seeing poorly finished (spackled) drywall nails.
This wouldn't be of a structural concern but could be easily repaired for cosmetic appearance.
If by 'crater' you mean something else, please explain....
Are your walls textured or are they smooth?
I was just wondering as one post here seems to think that they are textured and I do not remember see that in your question.
I would like to know what type of chemical reaction there is with the texture. Why don't you ask the guy that did the texture work what it is? I would like to know if just for my future information.