I already have separate circuits for lights and power. When the garage was built a 10-2 circuit was put in. The second circuit will be for the compressor only. It will be on a light duty cycle, hobby use only.
BTW - I do not have any room in the current garage box, it only holds two circuit breakers. One for the lights and the other for a 20 amp 125 circuit.

Thanks for all the help - George