I'm going for a mask similar to the airsoft ones you can buy, but with a more simply rounded shape. Just something to get familiar with the silicon as a material and to show off some Arduino code I've been learning.
This is quite easy as I am using a bike helmet as the main form, which saves time trying to make a new shape from scratch. It was already the kind of shape I wanted, so made sense. My helmet was too small for my face to fit in, so I will have to make it in two parts, Then joint them after they have been perfected.
I covered the helmet in cling film and then foil as not to ruin the helmet. I don't think the cling film was that necessary, more for peace of mind. The foil works really well and can be used on other things, and with the way it creases you can get it in gaps.
I then laid down some fibreglass cloth and polyester resin over the space I wanted the first half to take up.
After this was dry, I coated it in body filler. You're going to to a number of coats (with sanding inbetween) so do a thin layer of body filler for each. It's much easier to apply the perfect amount of filler than to have to sand away a load. Ice lolly sticks work amazingly for this.
You want to perfect each piece while it is still attached to the helmet, as it moves less whilst working on it.
