Making a mold

Build a small box to hold the mold material and the trim. Press the trim into the mold material and when you are happy, bake.

Keep in mind that the Sculpty shrinks a bit and that you probably should have a mold release. Talcum powder works .

exactly what is the mold for

i have seen several of the DIY Network's Show hosts make replicas of small pieces of trim... They use a latex medium (for a more flexible mold) I believe that there is a kit available out there to do this.. and the latex mold makes it easier to un-mold the item and make more that 1 replical

My hint is to use spray on the molds to prevent them from sticking.

You don't state what the trim material is,or whether you plan to make the mould from plaster, silicon etc. so I am just going to give you general links to mould making on YouTube.... https://www.youtube.com/results?search_query=how+to+make+a+mould+for+missing+trim