I don't know for certain if Batman possesses the capabilities to melt and destroy Mr. Freeze, but my former neighbor Nick sure does.
Growing up, Nick and Alli lived in the house behind ours, and they were definitely my sisters' and my best friends. (An important note is that when referring to Nick and Alli, you generally just considered them to be one entity, pronounced, Nick-n-alli. Just so you know.) Manders, Moose and I spent so much time at Nick and Alli's house, and vice versa, that they were practically considered family. Even so, the first night that my parents left my sisters and I home alone to attend a party up the street, the specifically forbid us from letting anyone, including the neighbors, inside. "Manders, we're expecting you to be responsible, so that means keep the doors locked and stay inside," my parents lectured. "We'll be back in a few hours, so don't get into trouble."
And we didn't get into any trouble, really. We ate our favorite dinner of mac 'n' cheese with chicken nuggets (i.e. the only dinner my sisters and I could make on our own), watched some Nickelodeon, and enjoyed an evening without our parents. But then, maybe 2 hours after my parents left, we heard frantic knocking on our front door. We peered through the glass and saw it was Nick-n-alli. "Let us in!" they shouted. "Out house is on fire!"
For the next 30 seconds, Manders, Moose and I looked at each other and shrugged, the contemplation probably visible on our faces as we silently debated what to do. On the one hand, our mom and dad specifically told us we were not allowed to let anyone into the house, including our neighbors. On the other hand, their house was effing on fire.
Manders made the executive decision that a burning house trumps parental rules, so we let Nick and Alli into our house.
Nick then told us what happened. He was playing with his Mr. Freeze action figure in the afternoon, when his mom called their family to dinner. Not paying attention, he tossed the Mr. Freeze back behind him and ran to the dining room, not noticing that Mr. Freeze had landed in the top of a standing lamp, right on top of the hot light bulb. While the family was eating their lovely dinner, the Mr. Freeze action figure was getting hotter and hotter, ultimately melting into a molten goo of scorched plastic. Meanwhile, the family had no idea what's happening ... until they noticed a burning smell coming from one of the bedrooms... and then smoke alarm went off.... and then Nick-n-Alli's mom send the kids running to our house as she called 911.
As it turned out, the house wasn't actually on fire; Nick's room was just full of smoke from the molten plastic that used to be Mr. Freeze. But that didn't stop 3 firetrucks from being dispatched to the neighbor's house. Or the panic my mother surely felt when Manders called her cell phone to say "Hi Mom, we're fine, but there's 3 firetrucks on our street..."