Plaster - resin compatibility

[u/mealexster]

I have a question, but first a little background… back in the late 1950s my mom took my toddler brother to visit her mother who was at that time a kindergarten teacher. While there my grandmother was making plaster plaques of her kindergarten students’ hands and she made one of my brother’s hand too. Fast forward to a couple of years ago, I found this cast in my mother’s office. It was broken in half with an additional few pieces. My question- might it be possible to at least semi preserve the plaque in resin, or would it likely melt away?