Want a better idea? Take the basic design of this thing, and instead of using it to dry your laundry, take some older clothes that you don't wear anymore, stretch them over the frames, and just leave them on there. Even better, you can do that just by hitting up the thrift store to get some old jeans and fitting them over the blades. Even better, you can get better efficiency by ensuring there's no gaps in the blade structure.
Also, by doing this, you're avoiding using steel or fiberglass which use a lot of resources to create. So maybe after five years or so the old jeans might be UV faded or torn by the weather. There's plenty of clothes in the same thrift stores you bought those first jeans from to replace them. Low in cost, and easier on the environment than steel or fiberglass.