Winsor and Newton - Galeria Acrylic Medium - Heavy Carvable Modelling Paste - 500 ml - Winsor and Newton Galeria Heavy Carvable Modelling Paste is the do-it-all version that is tough and fully "carvable". It remains flexible on a variety of surfaces. Suitable for multiple layers. Formulated to have the least effect on colour change from wet to dry. May be over-painted.
Colour may be added directly to modelling paste (note that colour will become lighter and more 'chalky' and the resulting paste will have reduced body).