Hi Just starting making my own Silicone moulds at home (to make some Farthing stepping stones for the garden) and wanted to ask is it possible to spray Silicone rubber on to a form (Farthing stepping stone) to form the first layer so you don't get any brush marks on the finished mould.
I picked up on this after some one on YouTube was asking how to eradicate 'Brush Marks' in the finished mould.
It sounds like a good idea but wanted to get other peoples thoughts on it before investing in a compressor and spray gun.
No, you cant spray silicone rubber due to its density...however..... 99% of the time when I make a silicone mold, I brush on the silicone rubber on the master piece to eliminate air bubbles from being trapped on the surface. I cast relatively small pieces, so a brush mark would really stand out. What I use is a soft bristle type brush....found at better hobby and craft stores everywhere. I have yet to detect any signs of a brush mark. I have seen wider than what I use (aprox 1/8th inch) perhaps 1" - 1 1/2"