Yellowcat, I said in my post I was not wanting to start an argument and also that airbrushing is not for everybody. In terms of a mask a simple surgical one for water based paint is fine and an in line water trap is a couple of bucks on ebay and certainly peanuts compared to the cost of a decent brush. I respect your views but was simply pointing out that if airbrushing works for you then fine just like if you use oils as opposed to acrylics.