In the interest of full disclosure: recovering my dining chairs with my grandmother's Dutch wool blankets was a dumb idea. The kids destroyed them within weeks. Try dabbing a lasagna stain out of a wool blanket with a washcloth. Times four kids, times multiple feeds a day.
With wipability now trumping charm In determining what to reupholster the chairs with next, I went with black vinyl. A $14.00 Etsy purchase later, the chairs were transformed into this:
A month in, they still look great. Good thing too, because no way am I going to tackle that a third time.