"Resin" is a thermo-set plastic, which means that it's pretty much done moving around once it sets up. If you get it hot enough past its "glass transition temperature", you can get it to warp somewhat, but nowhere near as easily as polystyrene will. Polystyrene used in models is a thermo-plastic, which means that it's pretty much infinitely re-meltable and can be formed hot easily. "Resin" won't melt, and probably will not soften enough to make "dents".
More boring science. "glass transition": http://www.pslc.ws/macrog/tg.htm
Thermoset plastic vs. thermoplastic: http://www.modorplas...-thermoplastics
Edited by Ace-Garageguy, 04 December 2013 - 07:27 PM.