Patent ID: 7479308

Claim:
A process for producing multicoat color and/or effect paint systems comprising (A) at least one primer, (B) at least one color and/or effect basecoat, and (C) at least one clearcoat comprising (I) applying at least one primer (A) curable thermally and with actinic radiation to a substrate to give at least one primer film (A), (II) exposing the at least one primer film (A) to actinic radiation to give at least one partially cured primer film (A) which can still be thermally cured, (III) applying at least one pigmented coating material (B) curable thermally to the outer surface of the partially cured at least one primer film (A) to give at least one pigmented film (B) which can still be cured thermally (IV) applying at least one clearcoat material (C) curable with actinic radiation to the outer surface of the at least one pigmented film (B) to give at least one clearcoat film (C) curable with actinic radiation, (V) exposing the at least one clearcoat film (C) curable with actinic radiation to actinic radiation to give at least one clearcoat cured with actinic radiation, and (VI) subjecting the at least one primer film (A), and the at least one pigmented film (B), to joint thermal curing.