The natural fibre and resin appearance of composites is often pleasing for clients. The almost holographic effect provides a modern look.
If this appearance is not preferred, then there are other options. Composites lend themselves to painting using extremely durable epoxy paints produced in the automotive industry.
Glass fibres can be dyed and overlayed on the outer layers to provide a non-structural but cosmetic effect.
It is also possible to overlay artwork using specialised paper. CAD programs can manipulate images to fit over 3-Dimensional shapes.