Producing an object (2), comprising: providing a tool (10) having a mould surface (14); applying uncured composite material (12) to the mould surface (14) to form an assembly (8); curing the assembly (8) to produce cured composite material (12′) having a surface (16′) the same shape as the mould surface (14); providing a digital model (24) of the object (2) specifying a first surface (4) and a second surface (6) of the object (2), the first surface (4) being the same shape as the mould surface (14); and, while the cured composite material (12′) is held against the mould surface (14), machining, using the digital model (24), a further surface (18′) of the cured composite material (12′) such that it has the same shape as the second surface (6) and the same position relative to the mould surface (14) as the second surface (6) relative to the first surface (4).