What Are Model Horses Made Out Of?
MHC Thread #1
facebook.com/groups/modelhorsecustomizers
There were disruptions in this group yesterday and I know many of you may be wondering what comes next. I want you to know that admins are here to listen, to learn, and to support the art you are already creating. One thing I do know a bit about is the stuff our horses are made of. Breyer style plastic has traditionally been a cellulose acetate plastic that can be softened with heat and gently repositioned, which is why heat guns and hot water tricks can work on those bodies when people are careful.
Even the general background on Breyer points out that “Breyer specializes in model horses made from cellulose acetate, a form of plastic,” which helps explain why controlled heat can sometimes be used to reshape legs or fix warps instead of the model simply breaking.
Artist resin horses are usually cast from polyurethane or epoxy resin. These resins cure into a harder, thermoset material that will not soften again with heat in the same way, but they can capture very fine sculpted detail and feel very different when you cut, sand, or repair them. A general casting guide notes that
“Most polyurethane resins are reasonably thin and can flow into quite intricate moulds” and that “Polyurethane resin cures very quickly and can often be safely demoulded after about 15 minutes,” which is one reason resin castings can show such crisp detail and be produced efficiently.
https://davidneat.wordpress.com/methods/mouldmaking-and-casting/making-a-small-mould-for-a-four-legged-animal-figure-and-casting/One manufacturing oriented overview for resin horse figures sums it up by saying that “High grade epoxy or polyurethane resins are the foundation of premium resin horse figures,” highlighting how important those materials are for fine details and durability. https://www.alibaba.com/product-insights/resin-horse-oem.html
I have a few more detailed articles on the difference between 3D prints and rein cast models:
https://seunta.com/cast-vs-prints
https://seunta.com/castaway/2025/11/18/the-science-behind-resin
https://seunta.com/castaway/2025/10/31/made-in-the-usa
All Resin Horses Are Not the Same — Seunta LLC
I have no favorite. I love all model horses!
What do you like or dislike about working on Breyer plastic bodies compared to resin pieces. Which one feels more forgiving when you are learning. Which one lets you push your ideas the farthest. You are welcome to comment with a photo of a project that taught you something about the material, good or bad. I am not here as an authority on customizing, but as someone on the manufacturing and marketing side who wants to understand what actually helps you make the art you want to make.