First apply a layer of undercoat to prime the surface, then, after having prepared your paints with the medium or the thinner , paint a pretty design, then place the object in the oven and keep an eye on the oven thermometer (and be patient). When, the piece comes out out as beautiful as you had hoped, you can sign the work with one of the brushes in your Workbox sets.
Filler/Undercoat - Filler undercoat is applied to porous surfaces (terracotta, wood, plaster ...) to avoid absorption of the colours and to guarantee that they retain their brightness.
Thinner - The Thinner makes the colours more fluid.
Gloss and Matte Mediums - A matte finish can be obtained by adding a several drops of Matte Medium to the colour. The Gloss Medium allows lightening the colour without thinning it.