Hi Christine @coatimundi
Polymer clay is amazingly durable and very strong if the correct clay is used for the specific task.
I use only Sculpey Premo now its my firm favourite over others. I have many prototypes which have stood up well to testing where other clays have failed. I really dislike Sculpey iii as its just too crumbly and won’t withstand much pressure for delicate work.
Fimo is my second favourite but so much harder to condition…
I have a special oven dedicated for my clay with a thermometer inside as underbaking or overbaking can weaken your finished piece.
Hope this helps abit
Karen 