Multilayer assembly

A multilayer assembly comprising:

• a metal substrate, said metal substrate having an inner surface and an outer surface,
• a layer (L1) consisting of a composition (C1) comprising at least one polymer (F), wherein polymer (F) is a fluoropolymer, at least one benzoxazine compound (B) and at least one aromatic polymer (P),
• said layer (L1) having a first surface and a second surface, wherein the first surface of layer (L1) is at least partially adhered to at least one of the inner surfaces and the outer surface of said metal substrate,
• a layer (L2) consisting of a composition (C2) comprising at least one functional polymer (F), wherein functional polymer (F) is a functional fluoropolymer comprising:
• predominantly recurring units of tetrafluoroethylene (TFE) 0.5 to 30% by weight of at least one per(halo) fluoromonomer (PFM) different from TFE;
• and
• one or more polar functional groups selected from the group consisting of carboxylic groups in acid, acid halide or salt form, sulfonic groups in acid, acid halide or salt form, epoxide groups, silyl groups, alkoxysilane groups, hydroxyl groups and isocyanate groups,
• said layer (L2) having a first surface and a second surface, wherein the first surface of layer (L2) is at least partially adhered to the second surface of said layer (L1), and
• a layer (L3) consisting of a composition (C3) comprising at least one polymer (F), wherein polymer (F) is a fluoropolymer, onto layer (L2).