This is a great idea, and I have used metal baskets for my succulents as well. I didn't even think about using rust-proofing paint--thanks!
I like to use fabric mesh (nylon), such as bridal veil tulle to line my metal baskets. I also use small scraps of this to cover the hole in pottery so I can keep my soil in the pot and let the water pass through. I like your window screen idea too!!
