Also know as directional, brushed, graining or satin finish, this is achieved using a grinder or a belt sander.
Whilst polishing produces a bright finished surface, linishing produces a matt finish, it can also remove
blemishes from the extrusion if present.
Different grades of finishing can be achieved by using different coarseness of media/grit.
It is often used for Aerospace cabin interiors, trim panels, electronic facias and automotive finishes.