The Polishing Bonnet 140mm is a removable cloth bonnet designed to fit over a 140 mm polishing pad for buffing, finishing and light compounding of metal, paint and gelcoat surfaces. It is intended for use with hand-held rotary polishers and bench polishers where a soft, low-abrasion contact surface is required to distribute polish evenly and produce a consistent shine.

Manufactured from a dense cotton/polyester blend with multiple sewn layers, the bonnet offers controlled loft and low linting for reduced surface contamination during finishing. The nominal diameter is 140 mm and the bonnet secures to the backing pad by an elasticated skirt that fits over standard 140 mm pads or a hook-and-loop backing plate. For attachment to the tool, the bonnet is compatible with backing plates and mandrels that meet common DIN, ISO and BS thread and attachment conventions (for example M14 and 5/8"-11 spindles when used with the correct pad/mandrel).

Typical applications include automotive paint correction, marine hull restoration, metal polishing in fabrication shops, joinery finishing and general surface preparation in maintenance and refurbishment work. Industries that commonly use this bonnet are automotive workshops, boatyards, metalwork and engineering shops, furniture restoration and facilities maintenance teams looking for a soft finishing option that works well with polishing compounds and waxes.

Key benefits of the 140 mm bonnet include consistent material removal with minimal heat generation, reduced risk of sanding marks compared with abrasive discs, and resistance to degradation when used with standard polishing compounds and mild solvents. Because the bonnet is textile rather than metallic, it is not susceptible to corrosion and its reinforced stitched seams provide improved durability for repetitive use. Compatibility with standard backing plates and common spindle threads ensures it will work with the vast majority of polishers on the market.

Duchy Fasteners stocks a wide range of polishing accessories, including bonnets in several diameters (including 75 mm, 100 mm, 125 mm and 140 mm) and multi-pack options for trade and workshop use. If you require different pack sizes or technical advice on fitment, our team can help select the correct bonnet and backing plate combination.