1. Dilute to a ratio of 1:3.
2. Separate the product into [acid-alkali resistant spray pot] and spray it on the contaminated surface, and make it adhere to it for 2-3 minutes.
3. Rub gently with [sponge] to remove dust particles.
4. Finally, use [pneumatic mud grinding disc] + [waxing machine], clean and complete the removal of iron powder.