For powder coating an electrostatic layer of 60-80 micron of polyurethane paint is applied to the aluminium. The necessity of cleaning is considerably less than for anodised aluminium. An extra advantage is that a repair to the powder coating can be carried out without removing the window.
Gebo ships' windows are anodised or powder-coated after all machining, thereby preventing corrosion to tapped holes or sawn surfaces.
The operational life of powder-coated or anodised aluminium is increased by regular and correct cleaning.