Re: Knob casting experiments
Fascinating... particularly the taking-a-mould and casting parts.
I'm wondering - have you considered using a really-runny-resin [without fillers or stiffeners] for the casting?
Someone I know regularly casts large prosthetics [think horns, hooves, claws] for use in Hollywood movies - she always uses a 'runny' resin so it follows precisely the contours of the mould.
Entrapped air-bubbles are always a problem in this sort of thing: she sticks her resin/hardener mix into a vacuum-chamber and pulls it down to a low pressure for a few minutes to make the air-bubbles expand and rise to the surface.
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