The full story is the CLEAR.
I shoot a little Auto Air but the recommended clear is 2 part urethane...Also in the PPG waterless classes, my friend was told about adding cross flow in his downdraft booth as the water flashes so slow you need a heat gun. What is happening with all this you ask...its bs,lies,nonsense.....heard many more...bottom line the EPA is going to try to remove anything solid in the air......