What do you think of magnetic paint/primer?

I am 15, and hopefully this spring we'll be painting the house...including my bedroom. It's a pretty small room, but it functions nicely. I'm going to stain my shelving units this brown/black color from IKEA, make a denim cover for my ottoman. My bed is a chair that folds out into a bed, and I have a denim cover for it. I'm looking at a bright, fun color for the walls. We are also going to make curtains for the windows out of magazines.





I was looking at magnetic paint or primer for the walls. I love magnets, and I thought it would be a cool way to put up my posters around the room. I was wondering if anyone had any advice because I am unfamilliar with any of this. What brands are good, if any? Has anyone ever used magnetic paint or primer?





Thank you so much for all your help here.What do you think of magnetic paint/primer?
its good for jailhouses