The problem is that unlike glue that just hardens on the surface, ABS and PVC "glues" are really solvents. Although each are different chemicals, they basically do the same thing. They melt the surfaces they are applied to so that when they harden they have actually formed a welded joint. In other words, you can't just scrape and chip the hardened stuff off of the vinyl surface. I know of nothing that will save the day for you. Sorry.