TIP: Because the MDF board is very thin and fine, its likely that the edges or tips will break while your working on the frame. I advise you to paint the tips with PVA diluted with a little water. This will strengthen up the corners and they wont break off or damage as quickly..! Seriously it will help you.
With the mould laid over, I can chisel away the excess wood back to the line, this makes sanding and forming it easier. This is one of the first tasks I do when starting work on each moulding and detailed piece.
Tools of the trade. Only after I am happy and confident that the carvings are good enough and uniform to the mould will I glue them into place. I will then finally sand them to completion. It's a long process and each detail will be unique in it's own right.