Moulding materials can be purchased from www.tiranti.com

Moulding with hot melt rubber

Section of frame to be moulded.

Make a clay wall around the section you wish to mould. Making sure there are no gaps. I use the smooth 'buff school clay' from www.potclays.co.uk

Cut up the hot melt rubber (I use Gelflex or vinamold) into a microwavable dish. Microwave for a few minutes then stir, repeat till it's melted. Be very careful not to overheat as lots of air bubbles will form, keep stirring while it cools a bit if you do get bubbles. It can also burn and produce horrible smoke. For large moulds use an electric melting pot.

Pour the rubber into the clay wall.

When cool remove the clay and peal off the mould. A small mould like this does not take long to cool about 5 mins. Make sure the mould is free of dirt and dust, wash in warm soppy water and dry.

Press the warm compo into the mould.

After about a minute, peel out the compo. You can now trim it with a scalpel and use it to repair the damaged decoration.

Moulding with Silicone putty.

A very easy way to mould small or upside down decoration. Mix the  two parts together with wet hands. Press on the area to be moulded. In about 20 minutes it's ready to remove and use.