@gwcrim,
the compressor should do just fine,
make sure the tapered end of the nozzle is covered with some pipefitters tape ,
this way no air gets spilled and the pistondrive out happens quicker
i have been sitting for minutes waiting for a piston to pop out
they can be real stubborn ,but air ALWAYS wins
if it s not oxidated and became one with the caliper tho
make sure the leaving piston makes a hold against a piece of wood ,
i once searched 2,5 hours just to find out the piston was really gone
?
which costs me 30 fer a new piston grrrrrr