My sister had two of her horses autographed at BreyerFest today and then we placed them into the boxes to dry. When we got them out several hours later, the markers smeared and then a few places got spots on them. We tried cleaning them right away, but we can't ge the marks off. I know one of them was autographed with a sharpie, but the other was a paint pen type marker, I believe. Any suggestions? She's pretty bummed :(