It's definitely a bleed through problem. Try spraying very light coats allowing ample drying time in between to see if you can get one of the spots to hide. If that doesn't work, you're going to have to strip it down to metal and recoat with rustoleum or better, an epoxy and urethane like Jim suggests. Mine was sprayed with epoxy primer and black urethane before the spatter and looks great with no problems.