A one-component, solvent-containing amino resin coating composition comprising as synthesis components at least one amino resin, selected from the group consisting of melamine-formaldehyde resin, benzoguanamine-formaldehyde resin, and ureaformaldehyde resin, at least one hydroxyl-containing polymer selected from the group consisting of poly(meth)acrylate polyols, polyester polyols obtainable by condensation of polycarboxylic acids with diols, polyetherols, alkyd resins, and polycarbonate polyols, at least one branched polyester polyol, obtainable by polycondensation of - hexahydrophthalic anhydride, - trimethylolpropane, - optionally at least one diol, the molar mixing ratio of hydroxyl groups of the trimethylolpropane to the hydroxyl groups of the sum total of all diols being greater than 1:1, - optionally at least one further triol, - optionally at least one further diacid or triacid or derivatives thereof, the acid groups and hydroxyl groups of the raw materials for the polyester polyol being used in a molar mixing ratio of 1:1 to 1:1.95, preferably of 1:1.2 to 1:1.8, and there being used in the polyester polyol less than 20%, preferably less than 10%, more preferably no tetraalcohol stoichiometrically relative to hexahydrophthalic anhydride, and the polyester polyol not being formed from dihydroxycarboxylic acids, optionally at least one chemical crosslinker, selected from the group consisting of blocked polyisocyanates, trisalkylcarbamoyltriazines, epoxy resins, carboxyl-containing resins, and amino-containing resins other than amino resin, at least one organic solvent, optionally at least one catalyst, optionally at least one typical coatings additive, optionally at least one filler, dye and/or pigment, the ratio of components to being greater than 1:1, based on solids, and the polyester polyol having a sum total of acid number according to DIN EN ISO 2114:2000 and hydroxyl number according to DIN 53240-2:2007-11 of 200 to 400 mg KOH/g. at least one amino resin, selected from the group consisting of melamine-formaldehyde resin, benzoguanamine-formaldehyde resin, and ureaformaldehyde resin, at least one hydroxyl-containing polymer selected from the group consisting of poly(meth)acrylate polyols, polyester polyols obtainable by condensation of polycarboxylic acids with diols, polyetherols, alkyd resins, and polycarbonate polyols, at least one branched polyester polyol, obtainable by polycondensation of - hexahydrophthalic anhydride, - trimethylolpropane, - optionally at least one diol, the molar mixing ratio of hydroxyl groups of the trimethylolpropane to the hydroxyl groups of the sum total of all diols being greater than 1:1, - optionally at least one further triol, - optionally at least one further diacid or triacid or derivatives thereof, the acid groups and hydroxyl groups of the raw materials for the polyester polyol being used in a molar mixing ratio of 1:1 to 1:1.95, preferably of 1:1.2 to 1:1.8, and there being used in the polyester polyol less than 20%, preferably less than 10%, more preferably no tetraalcohol stoichiometrically relative to hexahydrophthalic anhydride, and the polyester polyol not being formed from dihydroxycarboxylic acids, - hexahydrophthalic anhydride, - trimethylolpropane, - optionally at least one diol, the molar mixing ratio of hydroxyl groups of the trimethylolpropane to the hydroxyl groups of the sum total of all diols being greater than 1:1, - optionally at least one further triol, - optionally at least one further diacid or triacid or derivatives thereof, the acid groups and hydroxyl groups of the raw materials for the polyester polyol being used in a molar mixing ratio of 1:1 to 1:1.95, preferably of 1:1.2 to 1:1.8, and there being used in the polyester polyol less than 20%, preferably less than 10%, more preferably no tetraalcohol stoichiometrically relative to hexahydrophthalic anhydride, and the polyester polyol not being formed from dihydroxycarboxylic acids, optionally at least one chemical crosslinker, selected from the group consisting of blocked polyisocyanates, trisalkylcarbamoyltriazines, epoxy resins, carboxyl-containing resins, and amino-containing resins other than amino resin, at least one organic solvent, optionally at least one catalyst, optionally at least one typical coatings additive, optionally at least one filler, dye and/or pigment, the ratio of components to being greater than 1:1, based on solids, and the polyester polyol having a sum total of acid number according to DIN EN ISO 2114:2000 and hydroxyl number according to DIN 53240-2:2007-11 of 200 to 400 mg KOH/g.