- Strong ferritic flying spark burns which have deeply penetrated the surface must be removed mechanically or abraded.
- If the penetration of ferritic particles or scale is fine and superficial a pickling agent can be used to refinish.
- Rust bloom, extensive light brown stains, such as occur when diluted reducing acids (hydrochloric acid / sulfuric acid)are wrongly used on the surface and cannot be rinsed off immediately or thoroughly. In such cases one should attempt cleaning with an oxidizing acid (nitric acid/phosphoric acid) first.
- For oils, greases, organic dirt,please use alcohol to clean, for example, ethyl alcohol, isopropyl alcohol, or solvents such as acetone. Special biological cleaners are possible!
- For limescale, chalky deposits, cement and mortar splashes use cleansing milk products with calcium carbonate additives. For larger impurities a 10-15% phosphoric acid solution is recommended. A diluted vinegar solution in the ratio 1:3 with tap water can be used. Do not use scouring powder!
- Graffiti and other paints, please remove with special alkaline or solvent-based cleaners. Do not use hard scrapers or knives!
- Strongly neglected surfaces, dulled surfaces,require polishing pastes as also used for chrome parts on vehicles to bring the shine back.
* not for inherent material defects