I want to magnetize an 8'x8' wall in my studio. I've primed it with 5 coats of Rustoleum magnetic primer, which isn't satisfactory. The magnets barely stick to it--even the rare earth magnets. I'm not opposed to mounting steel strips--maybe 1 every foot--horizontally, the length of the wall. They're expensive. I'm looking to you nerds for a cost effective solution. Needs to look graphic and slick. I don't want to use cork and push pins. Help an idiot out for Christ sakes.