u/o0Fyuu0o

Currently working on a Lilith from Diablo 4 cosplay and unfortunately but not unexpectedly the horns are too heavy, so I'm considering creating a brush on mold specifically for the horns and use spray foam to mitigate some of the weight and had a few questions.

Any recommendations for brand/material for both the mold itself and the casting?

Will I need a support shell? And if so any recommendations would be helpful.

Probably a long shot based on photos any thoughts on approximately just how much I'll need?

Appreciate any help