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This may be caused by water seepage in the bathroom, and it is recommended to do a good job of waterproofing the bathroom first, then remove the damp wall, brush the separator again, and then make up it with putty.
I guess there is a crack in the wall, so the ants have made their home in it, buy some insecticide and spray it.
Hello.,This one is moldy.,There's no way.,Or brush it again.。。
It is best to brush SHF901 enamel paint (color retention grade 1 is required).
There are specialized bathroom cleaners and metal cleaners for sale.
1. Sprinkle some water on the wall with oil stains, and then sprinkle a layer of flour, after three to five minutes, when the flour is almost absorbed, gently wipe off the flour with a cloth to wipe off the oil stains. >>>More