The aim of this study is to document the weatherability and lightfastness of amino-alkyd coatings. First of all, the type of oil used to prepare the alkyd resin coating was changed by using soya bean oil, or castor oil, rice bran oil, or coconut oil, respectively; and then soya bean oil of different oil lengths in the modified alkyd resin was used to prepare the amino-alkyd coatings. After determining the weatherability and the lightfastness of the amino-alkyd coatings, the following conclusions can be drawn. When compared with the commercial amino-alkyd coating, the coating containing castor oil reveled the least degree of color difference, while the most remarkable discoloration was displayed by the coating containing soya bean oil. The amino-alkyd coatings containing soya bean oil and castor oil, respectively; both had distinguished gloss and adhesion properties of coating films. On the other hand, the short-oil-length amino-alkyd coating and unsaturated polyester coatings maintained the most stable colorfastness and gloss retention; alter natural and artificial aging treatments, respectively; the short-oil-length amino-alkyd coating revealed the best adhesion of coating film, while the worst properties were displayed by the polyester film.