guys, i can honestly 100% say your wasting your time with primer, you really don't need to use it at all with this paint, your only creating more work, and it is totally unnessessary. plus i've never used primer with this paint so it is uncharted teritory. i'll repeat myself and quote off the can "you can paint over bare metal, rusted metal, wood, fiberglass, dogs, cats, some specious of exotic african birds, gerbils, hamsters, blankets....(only a few animals were harmed testing this product!!!)