Method for the production of colour-and/or effect-endowing multicoat paint on vehicle chassis or parts thereof

A process for producing multicoat color and/or effect finishes on motor vehicle bodies or parts thereof (substrates), in which

• (I) a pigmented powder coating material is applied to the substrates,
• (II) the resulting powder coating film is partly or fully cured,
• (III) the powder coating film or powder coating is overcoated with a solid-color topcoat, with a basecoat and a clearcoat, or with a clearcoat, after which
• (IV) the resulting films are cured in each case individually or together with other films (wet-on-wet technique),
• wherein said powder coating material
• (A) comprises at least one carboxyl-containing polyester as binder and
• (B) comprises at least one glycidyl ester of an aromatic or of a saturated or unsaturated cycloaliphatic dicarboxylic acid and/or at least one N,N,N′,N′-tetrakis(beta-hydroxyalkyl)alkane-dicarboxamide as crosslinking agent, or
• (A) comprises at least one hydroxyl-containing polyester as binder and
• (B) comprises at least one internally blocked uretdione of a diisocyanate as crosslinking agent.