There are many causes of various defects during painting work. The vast majority of such problems arise with low quality of painting work.
Very often, after painting the surface, a layer of paint begins to exfoliate. This is mainly if you applied the paint on the contaminated surface or used a lot of glue. To eliminate this defect, it is necessary to make a scraping of layers of paint, clean and primer the surface. After that, re -paint.
Stains of bright yellow can also appear on the surface. This is due to the fact that the iron oxide begins to seep through the paint or plaster. You can get rid of such spots using a three percent solution of hydrochloric acid. In cases where the spot is large enough, you need to remove the old paint or plaster, and then this place is washed with a prepared solution of hydrochloric acid. If the stain is small, then after washing the solution, primer this area with a primer based on copper baths, which is available in most construction stores.
Using these recommendations, you can very well and quickly eliminate such problems.
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