| 摘要 |
<p>Facing of a wall or similar surface primarily for anti-graffiti purposes is effected by firstly the application thereto of a primer and sealing bonding agent such as a resin which may contain a proportion of aggregate such as china clay. This seals the surface and provides an adhesive coating for receiving a further coating composition, e.g. in paste form. The further coating composition comprises setting and filler materials such as gypsum and china clay respectively together with a resin binder and also a hardening and strengthening constituent such as mica. On setting, the coating composition provides a hard indentation resistant surface, but prior to setting, the surface is textured preferably to a pattern. A finish coating of cellulose based paint is then applied to the surface so that it can be over-sprayed by the same kind of paint to obliterate aerosol spray paint graffiti marking on the surface. The coating composition is preferably dyed with colouring matter at least approximating in colour to that of the finish paint coating.</p> |
