I purchased a gallon of water-based Varathane Polyurethane – Interior # 2002 (fast drying). The label does not indicate if one could use a spray gun to apply this type of varnish. But I still went ahead and put a small quantity in a spray gun. The problem when I applied this varnish is that the liquid does not spread evenly. It kind of forms tiny beads. It does not spread evenly like in the case of a standard oil-based polyurethane varnish. Any suggestions as how to resolve this problem. I love the stuff since it dries fast, in a matter of two hours.