If you boil it, you will destroy it. ABS can't handle high temperatures without deforming. Check out viewtopic.php?f=9&t=22577&start=0
There have been several other threads and YouTube videos using this process. People get varying results. None are perfect but most come out really good.
Thanks for the quick response! I guess I'll go shopping for some rit dye this weekend and I might post results here if it turns out good