Remove excess or flaking paint manually with a wire brush or with a cup or wheel brush attachment on a power drill. Always wear face protec- tion. If repainting, use a metal primer on the cleaned surface first. Once metal has started to corrode the process will continue, and accelerate, unless it is properly treated. Where you find rust, indoors in bathrooms or on leaky radiators, or outdoors on decorative iron- work or guttering, use a wire brush to remove all traces of it. Finish off with wire wool to clear away any fine dust from the surface.
After that, paint over the whole affected area with a rust- neutralizing primer – or a decorative rust-resisting enamel paint of the type used for radiators, which does not need a primer coat- and allow it to dry completely before applying the top coat. eutrali;e rust by nsing a printer that reacts u-itb the rust and [ornis II barrier betu/een the metal and the moisture-laden air. • • Wa 115 he different methods and materials used in the construction of walls often depends on the age of the build- ing, when alterations or extensions fif any) were made and whether the walls are external or internal.
For the purposes of decorating it is hardly important to know how walls are built for they are usually covered internally with a layer of plaster or plasterboard, which presents a smooth surface for painting or papering. All types of wallcovering – from wall- paper and vinyl to hessian, cork, and ceramic tiles – can be fixed with special adhesives, as along as the plaster is firm and sound. But for fixing anything heavier it is important to know what lies beneath the plaster so that you can make the right choice of fixing fsee p. 100-101). /I , a ~ ~ External Walls The outside walls of a house are usually built with a double thickness of bricks or blocks. Originally, walls would have been solid but, in the 1 920s, cavity walls were first introduced, and these are now stand- ard in houses built since that decade. These double walls improve insulation and reduce the risk of damp.