PURPOSE: To obtain a thixotropic unsaturated polyester coating compound composition providing excellent finish and appearance without being influenced by humidity during coating.

CONSTITUTION: In an unsaturated polyester coating compound composition comprising (A) an unsaturated polyester resin obtained by condensing an acid component containing an unsaturated dibasic acid and optionally a saturated dibasic acid with a glycol, (B) an ethylenic unsaturated monomer and (C) paraffin wax as components, the composition is mixed with (D) 1-15 PHR hydrophobic silica and (E) 0.5-2.5 pts.wt. hydrophilic silica.