You have the patience of a saint! It's looking great mate, very inspiring, and jealous :)
It has taken a lot of patience, but I can't recommend the Hirst Arts molds enough. The plaster is cheap, the idea glue is cheap PVA, and the proper paints are cheap craft paints. The only real big costs are the molds (about $30 each) and the time. I definitely have big plans for more molds, and will keep that on here.