I just found this thread on caudata.org, see link below. Johnny O. Farnen says urethane sealants are safe so long as you let it cure 1 week then soak it in tap water for 1 week with a bag of carbon. I looked it up and polycrylic is a fortified "water-based" polyurethane. Other urethanes are oil based. So this means it is safe, right? http://www.caudata.org/forum/f46-be.../65781-suitable-paint-aquarium-ornament.html#
If it wasn't sealed like that, I'd have buffed down the point bits to be safe; in fact I wonder if you could take sandpaper to it, to get rid of most of the coating?
If that's not feasible, best erring on the side of caution and not using![]()