The paint at the top of the windows is just too high pressure.
The bubbles on the roof is overspray sticking to whatever was on the shell previously. Not sure what you used for masking and not sure how you wash them out, but it looks like bubbles to me. and seeing as you only have it on one side, I would guess that its been cleaned with washing up liquid, but not dried off by hand, and the bubbles have left a residue on the shell which is what the overspray has stuck to.
Without know all the details of the job, then I can't tell you exactly what it is. If it was glue or such from masking then it would be straight lines. Which is whiy I suspect bubble from the washing process.
But generally after you've sprayed black (or any dark colour) for a fade, always wipe it with a clean dry cloth to get rid of any overspray. You can wipe the area before spraying to avoind the paint sticking too.
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