A coating composition comprising a film forming binder of a. an acrylic
polymer having pendant groups that are reactive with isocyanate moieties
and having a glass transition temperature (Tg) of 10 to 80.degree. C.; b.
a polytrimethylene ether diol having a Mn (number average molecular
weight) of 500 to 5,000; and c. an organic polyisocyanate crosslinking
agent; wherein the coating composition contains pigments and cures at
ambient temperatures or elevated temperatures and forms a coating that is
sandable and when used in combination with a top coat, for example, a
colored base coat and clear coat or a pigmented mono-coat forms a chip
resistant multi-layer coating useful for refinishing or repairing
automotive and truck bodies and parts the coating composition can be used
as an exterior clear coating composition primarily for automobiles,
trucks and parts thereof.