IMO krylon dosnt cover on glass as well as other things flat black or satin black looks good the first tank I painted I used duplicolor black for car interior covers great but dosnt come. In flat or satin just gloss I will post a pic of the krylon I used to paint the back of my 55 took 2 Coats so I wuld get 3 cans for sure. And if you don't want to use paint thiner get some goof off its a good idea to have it on hand to clean any over spray off aswell.
