The Presto rust eraser is ideally suited to removing small rust patches. Unaffected paint is not affected by the fine glass fibre (not wire) abrasion tips. Scratches or grinding marks are not created. Thanks to the considerable grinding ability of hard glass fibres every rust patch can be thoroughly removed. Also suitable for the scratch free removal of oxidation on electrical contacts (e.g. electronic parts and mobile phones). There is no risk of short circuits because of the metal-free nature of the eraser. Please see UK safety standards for use of chemicals.