Humbrol Model cote Satin Cote 28ml. Safe to use on plastic model kits. A solvent-based varnish that goes on clear & dries clear, overcoming the yellowing effect associated with traditional varnishes. The product dries to a smooth, mid-sheen satin finish. Common plastics used to manufacture model kits including polystyrene & ABS, as well as MDF. Satincote is usually applied as the final coat to a fully painted & decaled model.