Paints, and use of the paints for the finishing of automobile bodies

A paint comprising at least one member selected from the group consisting of:

• (i) a resin (A) which comprises hydroxyl groups and wherein .alpha.,.beta.-unsaturated carbonyl groups have been introduced by reacting a part of the hydroxyl groups with a diisocyanate and a compound containing .alpha.,.beta.-unsaturated carbonyl groups, the content of hydroxyl groups being between 0.01 and 50 mol and the content of .alpha.,.beta.-unsaturated carbonyl groups being between 0.01 and 20 mol, per kg of resin, or a mixture of such resins, and
• (ii) a mixture comprising of
• a) a hydroxyl-containing resin (B) having a hydroxyl content of between 0.01 and 50 mol per kg of resin, or a mixture of such resins and
• b) a crosslinking agent (C) having on statistical average at least two .alpha.,.beta.-unsaturated carbonyl groups in the molecule, or a mixture of such crosslinking agents, the components a) and b) being in a weight ratio of 99.99:0.01 to 50:50,
• and wherein the paint further includes a catalyst (D) which catalyzes the reaction of hydroxyl groups with .alpha.,.beta.-unsaturated carbonyl groups or a mixture of such catalysts, wherein the catalyst (D) is a Bronsted acid whose pKa value of the first dissociation state, measured at 25.degree. C., is below 1.0.