Next we used a vibrasaw to take off the overhanging edges of the fiberglass so the edge was where the bleeding edges were and it was more manageable and near. We then filed this down further with sandpaper to make sure it was smooth.
I was happy with how all these processes went however it was at this moment I realised that my original fibreglassing was too thin. This meant be mold wasn't really strong enough and a lot m ore delicate than it should be. It still worked as a mold but next time I need to do another layer of fibreglass to make sure my mold is stronger and more durable.
Next I put three layers of cap plastic into the mold as the base of the silicone prosthetic. I then made a 25% softened mixture of silicone (60g A + 60g B + 30g C) as a forehead is relatively hard but still has the normal softness of skin and poured this into my mold. I then screwed the two halves of the mold together and bolted it shut tightly to wait whilst it cured. Once opened I painted two more layers of cap plastic over the back.
Next time I will use a little more silicone as one area of the flashing didn't get filled properly and barely any silicone got squeezed out whilst the molds were shutting but apart from this I was very happy with how the piece had turned out.
One mistake I had made during this process has not using a mold release (vaseline) on the mold before adding the cap plastic. Although fibreglass isn't porous like plaster this still meant the silicone clung to it, causing a lot of my cap plastic to be left in the piece, this also meant I had a rip at the base of the piece.. Apart from this though I was very happy with how this piece turned out. The edges are neat and usable, the texture has transferred well to silicone and the piece felt the right level of softness. Next time I need to remember to vaseline the piece and I think it will work a lot better. Overall I was very happy with how the fibreglass mold worked.
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