Besides the issues mentioned in the previous questions, there are a few more painting flaws you might face when repainting your house.
Staining: Falling under the category of uneven patches, this flaw arises when a paint is applied over a stained surface and the stain starts ‘bleeding’ through. No matter how many times you paint over the stain, this is not likely to cause any improvement. The only remedy is to allow the painted surface to dry completely and then use a stain sealer over the affected area, after which you can repaint that area alone.
Blocking: Paint blocking also known as sticking, is the result of two painted surfaces coming into contact before either or both are dry. This can be prevented if you are sure to use a good quality paint and follow the manufacturer’s instruction precisely. If the damage is already done, using talcum powder over the affected surface can temporarily solve the problem. Like with staining, one will have to scrap away the paint on the affected area and repaint it.
Cratering: Paint cratering occurs once the blisters caused in paint blistering, pops or breaks. This results in the formation of tiny craters. Using old paint or low quality paint can result in this. The only solution is to use good quality paint and to make sure that the surface has been sanded down properly before paint application.
Fungal/Microbial Growth: This results in the darkening of walls or painted surfaces. One of the main reasons for this is dampness. If there is a leak somewhere or if the walls are constantly damp due to other reasons, there is a high risk of microbial growth. One of the only effective solutions is to make sure the room has proper ventilation and that the paint dries quickly.
Aging: Aging of paint results in yellowing if the surface especially if the painted surface is white. Yellowing or aging could be triggered or catalysed by lack of sunlight. So make sure the painted surface gets enough sunlight to breathe in.
Cissing and Insects: Cissing is when tiny impurities get stuck beneath the painted surface. Insects , just mean small insects getting trapped beneath a freshly painted surface. Wait for the surface to dry and then rub the surface with sandpaper. Once the surface is smooth and clean, reapply paint.
In addition to all this, there are also problems like picture framing, mud cracking and paint lap marks. These issues are best corrected during the paint session itself as these are caused by improper or careless application of paint.