green machine
I painted both cars in exactly the same position as the mazda - under the verandah. I t would have been early summer and about 20 degrees celius.
Prep wise - tiled area hosed down and the area enclosed in plastic sheeting to avoid spray drift.
Inline filter are ok but what the panel beaters use are toilet role filters. As the name implies. A large filter with a toilet roll inside it.
Pretty expensive but you rarely get a water droplet on the work area. If you do you can bet your filter is wet.
For future reference I will get you a photo of the filter unit today.
It's the best thing I have used. If you spend several hours spraying a car and your gun shoots a few water droplets via a bad filter - hours of work gone if not rectified immediately.
regards