You probably did coat the wrong side of the Melinex. There is an antistatic coating on the back side, and the subbing layer is on the front side. There is a way to identify the subbed side, there is an embossed 'E' on the edge. I don't remember if the 'E' is right reading with the subbing layer facing you, or wrong reading. I always just ran my fingernail along the surface - the anti-static side is slick, and the subbed side has some friction, some drag. You should be able to identify it easily using the fingernail test.
Regards - Jim Browning