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Im spraying SWilliams Classics Waterborne Poly through my Graco Airless onto trim and doors. I've had some great success but alas Ive been plagued by fish eye. Anyone have experience with this? I recently had my machine repacked and wonder if somehow the oil is getting into the line. TSL fluid contamination also? Its weird. I sprayed three doors (first coat) and they looked great. Moved on to some other doors that had already been coated once and they blew up. I wonder if the contamination is in the material in the can or in the material on the wood, or somehow the material is being adulterated during spray as it passes through my machine. It a trifecta of possibility. Makes me wonder if an airless is the machine to avoid when using a wb polyurethane.:blink: