What to do if the white wall turns black, how to remove the white wall when it is black

First sand off the black with sandpaper, and then use paint to remove the white or other colors!! This can be done in a few years! Maybe you'll change houses in a few years!

Brush it again and there's no good way to do it or you can paste some large paintings.

After grinding off the black ones with sandpaper, re-brush.

I suggest changing the color to a different one.

The white walls are not very good-looking, and they are not resistant to dirt.

Change the color, change the mood.

Hee-hee...

Method 2: Polishing the surface with fine sandpaper, and then use a dry cloth to remove the surface dust, remember not to get wet.

Method 3: Gently grind the old wall with 240 particles of sandpaper to remove pen marks or stains, and then wipe the wall clean. Or directly brush a surface coat, and then use Xuanhejun glaze stain-resistant paint, brush or barrel on the old wall first, half an hour after the first coating is dry, and then brush again, the surface anti-fouling layer has been done.

Material: Xuanhe Jun glaze stain-resistant treasure bucket.

Tools: a brush or barrel.

Effectiveness: pens, gel pens, pencils, inks can be scrubbed without marks.

Quality inspection: inorganic mineral coating, 0 formaldehyde without glue, environmental protection and health.

After the wall painting is completed, if there are pen marks and stains written on it the next day, you can wipe it with water, and you don't have to worry about wall pollution.

If the white wall is blackened, there are 5 ways to remove the stains on the white wall: 1. Remove it with toothpaste + white vinegar; 2. Remove with bleach; 3. Remove with baking soda; 4. Remove with sandpaper or blade; 5. Repaint the wall.

1. Toothpaste + white vinegar.

The toothpaste contains a brightener that can whiten the blackened wall, and white vinegar can soften the dirt for easy cleaning.

How to use: Stir the toothpaste and white vinegar evenly and pour it into the watering can, spray the mixed solution on the blackened white wall with the watering can, wait for a few minutes, and then wipe the wall back and forth with a dry rag until the stain is completely removed.

2. Bleach.

Bleach contains some chemicals, which can be used to bleach through oxidation reactions, and some shallow marks on the wall can be treated with bleach. How to use it: Put bleach on a rag, then gently wipe the blackened part of the wall, and try several times to remove the marks.

Note: Be sure to deal with the white wall as soon as it is blackened, otherwise the stain will be difficult to remove if it seeps into the wall.

3. Baking soda.

Baking soda has a good decontamination and whitening effect, and stains on white walls can be slowly faded after being treated with baking soda. How to use: Stir baking soda and water together and pour it into the watering can, and then spray the black place on the white wall with the solution, without wiping, and wait for the traces to fade slowly.

4. Sandpaper or blades.

If the stain area is relatively large and cannot be removed by the above methods, you can use fine sandpaper to directly polish off the wall stain, or use a knife to gently scrape off the black stain.

5. Repaint.

White walls are different from colored walls, there is no serious color difference problem, if the blackened area is too large, you can choose to directly repaint to cover up the stains.

Causes and remedies for wall peeling:

1. Water leakage and water seepage.

The waterproofing effect of the wall is poor, and if it is soaked in moisture for a long time, the wall skin will be damaged. Remedial cherry tree excavation method: It is necessary to find out the leakage and seepage points, and then shovel off the peeling after treatment, and repair it with putty spinal nucleus powder or repair ointment.

2. Anti-alkali appears.

After the first construction of the wall, the next step of construction is done before it is completely dry, so as to precipitate alkali salts. Remedy: Shovel off the anti-alkali part and shovel a few more times, then scrape the gypsum powder or repair paste mixed with white vinegar, and finally wait for the paint to dry thoroughly.

3. Waterproofing is not done.

The waterproofing of the ground and wall is not done, so that the water infiltrates and damages the wall, especially the bathroom floor, wall or ground on the first floor, lighting and waterproofing are the focus. Remedy: If the wall is not damp and not serious, you can remove it by yourself and remedy it with repair cream, if it is serious, it is recommended to remove the original wall, do a good job of waterproofing, and then scrape putty and paint.

If the darkened area is relatively small, you can try wiping it with a detergent to see if it can be wiped off. If the blackened area is large, it is recommended to repaint the wall. Before painting, the wall skin must be removed, and the base layer of the wall should be kept tidy before construction.

First of all, you have to scrape the putty for the first time, the first putty should be thicker, and wait for the first putty to dry before applying the second putty. Then apply the latex paint, which also needs to be brushed twice. The first is primer, and the second is topcoat.

After the paint has dried twice, the repair can be completed. Maintenance methods of the wall: 1. If you want the wall to be as white as new, you need to clean it frequently, and you can use cleaning tools such as a feather duster to sweep away some of the dust on the wall in daily situations.

If there is a stain on the wall, it must be cleaned up in time to avoid trouble cleaning up after a long time. 2. If the wall decoration time is relatively long, it feels relatively old. You can also remove the topcoat and repaint it with a new one.

3. Although the white wall looks better, it is not recommended to use it to paint the white wall in a humid or heavy oil smoke environment. Because, in a humid environment, it is easy to cause the paint surface to peel off, and in the oily smoke environment, it is very easy to stain the white wall, which is not easy to clean. Therefore, in home decoration, there are generally more wall tiles in these two places.

How to make it white when the wall is black？First of all, confirm the reason for the blackening of the wall, if it is moldy, then you need to wipe the moldy part clean and then paint or brush putty, and if it is smeared by a brush, you only need to wipe it clean with an eraser, no need to scrape putty.

Precautions: 1. When using the room, you must do a good job of maintaining the wall regularly, you can use stickers, you can also use paint, and it is best to choose a good waterproof paint to prevent a large number of molds from growing due to moisture.

2. When decorating, if you do not wait for drying when brushing putty, it will lead to moisture inside, and a large amount of mold will be produced in the later stage.

3. When decorating, we must choose a professional master, they can distinguish the difference between the advantages and disadvantages of materials, and the materials on the market are mixed, so we must choose green products in the selection of materials, and must not contain formaldehyde and other polluting substances, which will affect the health of the human body. You can choose some big brand products, or directly ask the merchant to provide various certificates of the product, do not buy products that are close to the expiration date, although they have not expired, but there is still some damage to the human body.

4. It is also very important to do a good job of hygiene, regularly open doors and windows for ventilation, and regularly use a feather duster to dust off the dust.

Do a simple job of clearing the walls, then paint them with white paint.

In the process of painting the wall, it is necessary to ensure the basic flatness of the wall, so as not to cause uneven painting in the next step of the painting process, and at the same time, in order to increase the adhesion of the wall paint and the wall, you can use wall cloth and other things to increase the wall bonding, and the painting process should be uniform and meticulous, so that the wall will become white.