FTALON 9038/70 AET is a saturated polyester resin modified with fatty acids in ethyl acetate with a high percentage of hydroxyl groups, used in combination with polyisocyanates in the preparation of sandable wood primers for the industrial and furniture sectors and in the preparation of “oily”-based printing inks. It is particularly used in the preparation of wood primers with properties that require rapid application. Furthermore, when catalyzed with aliphatic isocyanates, it can be used in the finishing of top-coat paints with excellent wettability and flow, gloss and scratch resistance.