How is everybody duplicating molds??

[mangozac]

Now I'm not slow or dense so I'm assuming it's a product to add to resin thats cheaper then the actual resin?

You got it! Often people use talc for this purpose. You can also get products called micro balloons/micro balls which are tiny, hollow glass balls intended for this purpose (good for making parts buoyant).

[Commissar-Krad]

Off topic, micro balloons also look great as snow for basing.

[Fleafa]

Off topic, micro balloons also look great as snow for basing.

Good to know!