Ok I just successfully bought 5' of black plastic pipe that seems to be PVC or something... when ground up and put in the Acetone, it didn't do ****. Just curious, we took a K-Nex toy and placed them in the acetone. Within seconds the water took color of the plastic of the toy. Then the pieces of plastic started stickin together... ok... so aside from k-nex toys, any one know how to accurately buy ABS plastic here in the states???