1. Binder composition - use alcohol or organic solution to clean stainless steel bolts.
2. Fingerprints - use alcohol or organic solvents (ether, benzene), dry them with a soft cloth, and then wash them with water.
3. Excessive rainbow pattern - caused by using detergent or oil, use warm water neutral detergent when washing.
4. Labels and film - scrub with warm water and weak detergent.
5. Discoloration due to heat during welding - wash with 10 percent nitric acid or hydrofluoric acid solution, then neutralize with ammonia carbonated soda solution and then wash with water - specially used for washing medicines.
6. Organic carbide attachment - soak in hot neutral detergent or ammonia solution and wash with weak abrasive detergent.
7. Rust caused by surface pollutants - use nitric acid (10 percent ) or abrasive detergent to wash - use special cleaning chemicals to clean hardware bolts.
8. Dust and easy to remove scale - wash with soap, weak detergent or warm water.
9. Fat, oil, lubricating oil pollution - dry with a soft cloth or paper and then wash with neutral detergent or ammonia solution or special detergent.
10. Bleach and acid attachment - immediately rinse with water, soak in ammonia or neutral carbonated soda solution, and then wash with neutral detergent or warm water.
