The uncovered radiator was starting to seem a little dangerous in the kids' bath, and since I had a bit of Ikea shelving left over, and a leftover can of primer turned out to match perfectly the color of my newly installed rubber floor, I took a page from Max Lamb's Reference Library x Apartamento Magazine playbook.
And that's how I saved $187 [$195 for a custom radiator cover, minus $8 for a pint of pink paint] and learned a nice lesson in the importance of proportion, all in one afternoon.