OK, you asked for it. JoseDominguez BSc mode.
1) All rules change in space: no conduction or convection.
2) A fluid filled body would boil instantly, due to the lack of external pressure. So, you got that bit right.
3) In a fraction of a second, the body would lose all of it's thermal energy to space (which is extremely cold) and would freeze solid.
4) Any side exposed to the sun (or any star) would begin to sublimate (liquids aren't stable at this temp) losing it's water as vapour. The dark side would remain frozen solid.
Evidence: a comet is a solid ice-block with a tail of sublimating vapour. Three russian cosmonauts were exposed to hard vacuum, they came back intact (not popped) and very frozen.
So, a paintball in space would boil very rapidly, cooking the fill to glue, then freeze solid as it lost heat to space.
And, as Istated before, I like this thread, it's stupid.