By user13334066 on Qer 20, 2006
Probably detailed introduction in order, so moving left to right:
First is the Resin. This is a very viscous fluid, which when mixed with the next two chemicals in line - The Accelerator and the Catalyst - has the property of "hardening". The normal ratio is around 20:1; that is, for 100ml of Resin, you mix about 5ml of Accelerator as well as 5ml of Catalyst.
Now, this is just the chemical part of it, which provides the "flesh" of the structure you build. The Skeleton comes from elsewhere, and for that you need the fourth item in line - the Mat. It looks like a fabric, and it is indeed one, except that the strands or fibres are made of glass.
And the fifth member, the Brushes, obviously is to apply the mixed solution of Resin, Accelerator, and Catalyst onto the mat. The way we go about it is simple:
 Using cardboard, create the exact shape which
you want to make.
 Cut the Mat into shapes suitable to cover the
surface area of cardboard shape.
 Mix Resin, Catalyst and Accelerator.
 Apply a coat of the above solution to the
 Using piece(s) of the cut Mat, form a layer of Mat
over the freshly coated surface.
 Apply multiple layers of the solution over the Mat
 An exothermic reaction kicks off soon. Let it cool,
 After an hour or so, when the chemicals have hardened
enough, strip off the cardboard layer completely,
leaving behind just a layer of fibre glass in the
exact shape which you needed.
Our original intention was to fabricate a lightweight petrol tank for the dragbike; But that quickly proved to be way beyond our beginner skillsets though.
So abandoning the tank idea, we set about building a proper racing seat. The one on
the far left is our first attempt - really pathetic. I made a lot of mistakes with
the mixing ratio as well as the layering, it really messed up bad.
The next one came out better, well rounded and much neater. I applied the layers on both sides of the cardboard - effectively sealing the cardboard layer inside - and it came out quite strong