i think i added a tad too much mineral spirits, but it wasnt as thin as water. I mixed it in a cup, so i would splash the side of the cup, and see how it ran down. I definently used more than 20:80 I got some bubbles too, i found if you blew on them, they went away, and would level out somewhat. It went right over bonbo. what do you think. This picture is RIGHt after i put the paint on. i figure the bubbles will come out when i wet sand.