Cleaning may be described as the need to remove material (rust, paint, surface deposits) for the purpose of returning to the original surface finish or removing (keying) the material prior to sanding. This process can be achieved with the use of various types of wire or abrasive.
- Wire brushes: Twist knotted wire brush wheels are ideally suited for brushing out welded joints and brushing sharp corners. Bevel brushes are designed for brushing hard-to-reach areas such as edges and corners and are available in 115mm, 125mm and 178mm diameter versions. Cup shaped wire brushes are also available and are suited for surface cleaning of mainly flat or lightly contoured areas. Cup shaped wire bushes are available either with an aggressive twist-knott or with crimped wire in diameter sizes 65mm, 80mm and 100mm. Care should be taken when deciding the type and size of the brush as its maximum speed may not be suitable for smaller angle grinders. Twist-knotted wire brushes are usually secured to an angle grinder by a retaining nut whereas cup brushes have an M14 thread suitable for angle grinders 115mm and greater.
- Cleaning fleeces: Ideal for use on metals including stainless steel, wood and plastic. These are made of silicon carbide abrasive on intertwined nylon fibres in synthetic resin and gently hardened and applied to a glass fibre backing and available in diameters 115mm, 125mm and 180mm. Ideal for the removal of old paint, rust and welding splatter without scratching the surface of the work-piece, cleaning and smoothing wood and plastic. Also available in longer-lasting ceramic abrasive.