Did you get the stain off? When I was a kid, my brother and I were fighting while drinking grape juice. I got pushed, the grape juice hit the ceiling in the living room. We had a purple stain for quite a while until my dad was able to get enough paint on it! Another time, my mom got a "grape juice" recipe from a neighbor. Mom made it and put it in sealed jars down in the basement. A bit later, small explosions were heard coming from the basement. Yep, it had fermented, and wine was being made. Oops!