One. How to remove the cement residue on copper doors.
1、If the plastic film on the copper door surface is still intact, and the concrete has fallen onto the protective film, this is relatively easy to handle: simply remove the plastic film.
2. If cement falls on the copper door surface, and the cement is dry, first rinse the cement with water and use a hammer to remove large pieces of cement. Then, use a brush to remove the remaining cement.
3. Apply the cement cleaning agent to the cement surface, wait for 5 minutes, and then rinse the cement surface.
4. Apply the toilet bowl cleaner mixed with water to the concrete surface. once it starts to dry, use a scraper to remove some of it, repeating this process several times. The remaining concrete can be easily cleaned with a brush.
Two. How to handle the blackening of copper doors and concrete surfaces.
The blackening of copper doors and concrete is due to:
Copper doors often darken at the points of contact with concrete due to the presence of moisture and other substances in the concrete, which can cause oxidation of the copper surface and lead to blackening.
1、Soil rust
Generally, the black discoloration on copper doors is caused by rust, which typically occurs due to prolonged use. This type of rust can also be removed.
2、Boiling water
To remove soil rust, boiling water is required. This means water that has reached its boiling point. If possible, the affected areas can be immersed in boiling water. We recommend that users wear heat-resistant gloves when using this method to avoid burns from the hot water.
3、Soft brush
When soaking, use a soft brush to scrub the black areas around the copper door, removing the black rust. This is usually easier after soaking for about 30 minutes in hot water.
4、Dry Brushing
When brushing, the editor recommends using a stiff-bristled paint brush for better results.