Combi 3D lettering These images display a range of 3D signs that work successfully in this Combi cafe. The skillfully fabricated steel letters RAW BAR aged with ferrous oxide are made in 2 parts where the removable front also allows for easy fixing to a wall or other surface. This attractive timber/ply light box with LED illumination is another example of using laser cut lettering to enhance the effect. The white combicoffee letters are laser cut from foamex then suspended by aluminium rods.