Jinx,
I think I'm a professional painter, at least that is what they tell me.
Have you popped any of your little bubbles? Filled with air,
oil, water? So hard to diagnose paint problems without seeing them.
Lets go right back to the beginning...I'd bet that when you started the original body work, you simply started sanding?
If so, what may have happened, the car simply was not clean enough. You can't see it, or shouldn't. You can't feel it, smell it or even taste it...yuck! But every company uses a "mold release agent" on their molds. In other words--wax.
Without cleaning, this almost invisible wax off the body, the only thing you're doing is melting it and forcing it deeper into the glass it self. Over a period of time, sometimes hours, sometimes months, this wax will eventually work its way back to the surface.
That is just one of many reason for bubbles to appear.
DV...don't touch that body until it is totally wiped down with Acetone!