Stainless Steel – Cleaning Surface Contaminants:

Type of ContaminationCleaning Agent
Grease, oilsSoapy water, cleaning creams, alcohol-based agents, acetone.
Limescale deposits (hard water)Diluted vinegar, citric acid.
Coffee stainsBaking soda.
Tea stainsWashing soda (sodium carbonate), cleaning creams.
Adhesive residuesAlcohol- or acetone-based solvents.
FingerprintsSoapy water, glass cleaners, mild detergents, damp microfiber cloth.
Graffiti and paintsPaint removers, either alkaline or solvent-based.
Mortar or cement stains10–15% phosphoric acid solution, diluted vinegar (1 part vinegar, 3 parts water).
Heavily neglected surfaces, stubborn stainsMetal polishing pastes (similar to those used for chrome parts), phosphoric acid-based products.
Iron particles – light discolorationCleaners with mild calcium carbonate additives, citric acid-based products, mild household creams or pastes.
Iron particles – fresh grinding dustSaturated oxalic acid solution (leave on the surface for several minutes, rinse with water, and dry).
Iron particles – moderate rust discolorationPhosphoric acid-based cleaners, saturated oxalic acid solution, nitric acid solution with warm water in a 1:9 ratio (leave on for 30–60 minutes, rinse with water, and dry).
Iron particles – heavy rust stains caused by corrosion of iron residuesDegreasing, pickling, passivation.
After cleaning, rinse surfaces thoroughly with water and, if possible, dry them completely.

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