Magnet Frame

My wife and I have been collecting magnets on our travels across the country since we have been married. My wife usually put them on the fridge and showed them to all our friends. (I think some of the friends thought we were crazy). Well since my daughter has become mobile (crawling and taking a few steps), she loves to go to the fridge and play rearrange the magnets. Rearrange them to the floor, under the fridge, in the pantry, or wherever she can put them. In order to protect our big investment, my wife commissioned me to build the ultimate in magnet storage. A piece of metal with a frame. Not much wood working, however, I did route the frame myself. Twice actually. First time in Aspen (which splintered like crazy) and then again in popular. After matching our kitchen cabinets as closely as I could. I stained and laquered the frame and then attached a 20” x 9’ long sheet of galvanzed steel. Hind sight being 20/20, I would have put the steel on a backing of 1/4” ply or something similiar and attached the frame to that. However, it my case, it’s merely the metal and the frame which makes it seem very flimsy, but since it’s kept up high and hung with 4 hooks, it should be fine.