Mechanical surface preparation can be carried out using hand or power tools, to BS EN ISO 8501-1 standards St3 & St2.
St2 Preparation – Hand tool cleaning, such as with a wire brush or sander can be used to remove loosely adhered mill scale, rust or old paint. However, hand cleaning tends to leave a layer of tightly adhered coatings or rust on the surface.
St3 Preparation – Power tools, such as rotary wire brushes, sanding discs or needle guns offer more effective and less laborious cleaning, including for power tool cleaning to bare metal.
While these methods don’t provide the same level of cleaning as abrasive blasting, they can be acceptable alternative methods.
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