Process for coating fiber composite panels at low baking temperatures

A process for producing a multilayer coating onto a fiber-reinforced composite material, comprising the steps of

• i. applying a primer composition onto the fiber-reinforced composite material to form a primer layer and at least partially drying the primer layer,
• ii. applying a basecoat composition onto the primer layer to form a basecoat layer and at least partially drying the basecoat layer, and
• iii. (a) applying a first clearcoat composition 1 onto the basecoat layer to form a first clearcoat layer 1 and curing the layers formed in steps i., ii. and the first clearcoat layer at a temperature of at least 80° C. and subsequently applying a second clearcoat composition 2 onto the thus cured layers to form a clearcoat layer 2 and curing clearcoat layer 2 at a temperature of more than 25° C. to less than 60° C. for 10 to 40 min;
• or
• (b) directly applying the clearcoat composition 2 onto the basecoat layer to form a single clearcoat layer 2 and curing the single clearcoat layer 2 at a temperature of more than 25° C. to less than 60° C. for 10 to 40 min followed by curing the primer, basecoat and clearcoat layer 2 at a temperature of at least 80° C.