Would I? Yes. Despite the fact that I have way too much fabric. That is why I am going on a 1 year No Buy except for swaps or fabric needed to finish a UFO. I need to get the stash down.
I only use clearance fabric (at LQS) for backings, so I'd get enough for 2-3 backings rather than for an unplanned project. Perhaps by the time I'm ready to use the backing, something might come to mind, but in the meantime, I have a nice backing.