Though it’s not exactly a headBOARD, we love this painted canvas hung on the wall at the head of a low bed. And we are inspired by the canvas Cy Twombly tacked right onto the walls of his Rome villa, ready for painting.
63-inch by 6-yards rolls of primed artist’s canvas can be found on Amazon and at art stores. Then it’s just a matter of doing your thing using acrylic or oil-base paint (and giving it plenty of time to dry).
We’re also thinking that just about any big swath of fabric could be beautiful painted with acylic paint…taking a cue from this great Wary Myers’ pillow…

…and these chairs we posted some time ago…

You need to mix acrylic with a polymer emulsion to turn it into washable fabric paint, and leave the fabric soft and pliable. You can read how to use it here and here,
via SFGirlbyBay; photo Brittany Ambridge for Domino
I’ve been wanting to do this for some time – glad for the push (and the links to resources)!