I plan to sculpt some things and cast in a hard resin- would this be safe long term for a tank with an aro in it? The water wont bug it or cause it to leech or anything? Or would it break it down? I just wanted to sculpt some skulls or even aros and cast them to place in the tank since my fish is a GIANT jerk and killing everything I figured the cast would look cool. Also worried about paint leeching off. Anyone ever do something with resin?