Works as great magnet board for kids. It’s cost effective, easy to hang and magnets stick to it perfectly. Edges are sharp (as expected) so we built a boarder and put caulking all on the edges. We also framed in and hung other items on the wall (3D dinosaur frames and a felt board) but the galvanized steel is located on the bottom of the wall to the right side in the attached photo.
I bought this Galv-Steel Flat Sheet to make a roof for our golf cart. It fit perfectly by miracle! I only had to trim a few centimeters on one corner due to my "square" fabrication skills and welding. After I was done mounting it with self tapping screws into the roll cage I reinforced it with rubber-in-a can on the top and plastic poster board underneath. I then covered all the edges with foam pipe insulation. It looks awesome, has withstood 40 mph wind gusts, and I've received many compliments. Master Flow rocks!
I needed to fabricate an 8"x12" duct offset for a return I was adding. While this material did the job, I really wished that I went with 28GA or 26GA material, even with the small duct size I was dealing with. It is just so thin, it deflects and deforms very easily. That certainly makes it very easy to break and form, and it will serve it's purpose, but the 30GA thickness is a limiting factor here. I certainly wouldn't use it for fabricating anything over 12" wide.