resin piece goes soft when temperature is hot

Hi Stephanie,

What kind/brand of resin are you using? This can be pretty typical of epoxy resins, especially certain brands.

Have you tried the Resin Obsession super clear resin? It’s what I like to use as it maintains its shape well, even with body heat. You can find it in several sizes in our store here:
https://shop.resinobsession.com/collections/resin/resin-obsession

You should know that that if any epoxy is left in the sun on a metal surface, it is likely to get soft and warp.