washads, definition of

Washads refer to use of the cleaning of surfaces in a specific way to leave behind an advert by the shape of what was cleaned away. Often this is achieved by the use of a metal stencil 'punched' through as to leave the required advert when used with a power water cleaner.

Its is essential a form of 'green graffiti' or 'reverse graffiti'. The legality of the undertaking really depends on the laws in force in particular country and government district(s) concerned. Some do not specifically prevent it, whilst others classify any form of advertising as requiring explicit prior permission of the owner of the surface being so advertised upon. 

Related Tags: graffiti, reverse gaffiti