Orders and medals manufacturing techniques

[Lapa]

There is a simple answer to your question. The enamel powder is applied as a water based paste. It can be applied in miniscule spaces with a tiny brush. (An eye dropper is also used for the watery paste)It can be applied in thick layers and it can be re-applied over other layers to build up the finished product.

Steve

Steve,

That is not quite true. First of all, it is not a paste. Real glass enamel is a fine powder that, sometimes, is mixed with a bit of distilled water simply to make it easier to apply onto the piece. However, that powder is not soluble in the water.
A brush will not be handy to use at all; instead, some small tools (such as dentist's tools) or bamboo pipettes are the proper ones.
Finally, enamel should be apply as a thin layer, but you would not build up several layers of the same shade in the way you describe. The surface to be enameled is specifically worked in order to prepare it, and in such a way that the layer of enamel will be fairly thin.

Marc