a friend of mine creates his own latex costumes
he uses the following mixture to spray (airbrush) his costumes without cracks, even after intensive use.
A few important remarks first!!!
1) Good ventilation and respirator-protection is required for this technique
2) good cleaning of your airbrush afterwards, using ammoniak and water
3) your latex must use ammoniak as a solvent in the first place
mixture: 1/3 liquid latex + 1/3 water paint + 1/3 ammoniak (commercial grade from DIY)