Swarfega is a brand of heavy-duty hand cleaner, primarily used by mechanics and industrial workers to remove grease, oil, and other tough substances from the skin. It typically contains a blend of solvents, surfactants, and sometimes exfoliating agents to effectively break down dirt and grime. Swarfega is known for its distinctive green color and is often available in both liquid and gel forms. Its formulation allows for easy rinsing with water, making it a popular choice in various work environments.
You need to tell us what the fault is. If the locks have become difficult to turn with the key (as Ford locks do) then just squirt some Duck Oil (Duck Oil is now a Swarfega brand) into them. A squirt of Duck Oil will also stop your locks from freezing up in the Winter.
You would clean Cotswold stone using a product called Swarfega Brick and Masonry Cleaner. Wearing household gloves, mix the cleaner in some warm water and dip a plastic brush in the solution. Scrub the stone gently a wipe away any residue with a clean, damp cloth.