How to fix uneven or blotchy paint: No matter how many additional coats of paint you add, this problem likely requires going back to the drawing board. If you run into uneven or blotchy paint, the best thing to do is start over.
Scrape off the offending bits, then use your 150-grit sandpaper to smooth the wall. Tack it and paint again. If you can't get a big blister smooth, you may have to spackle the wall, let it dry, and then sand it smooth, he says. “Then tack and try again.”
Painting over existing layers of paint is usually the easiest option. A paint that has high coverage and a thick texture, such as our Claypaint or Lifestyle emulsions, will even out any hairline cracks and slightly bumpy surfaces. Both products can go over a multitude of wall substrates.
Sand the wall lightly to smooth out any imperfections. Prime the wall with a good quality primer before painting. This will help to seal the surface and prevent the paint from soaking into the drywall, which can cause the paint to appear uneven.
Brush marks are caused by strokes that leave the paint with a rough texture and visible brush strokes. The rough texture and visible brush strokes can be easily covered in a second coat of paint by using a slightly different technique than you used for your first coat.
Wall condition: If your walls are in good condition, you may only need one or two coats of paint to achieve a smooth, even finish. However, if your walls are rough or damaged, you may need to apply additional coats to cover up imperfections.
If the humidity is too high, the solvents in the paint will take longer to evaporate. This long drying time cause the paint to dry with a darker appearance, though it can also lead to uneven drying, streaks, and paint discoloration.
Patchy paint can be down to a variation in surface absorption. Walls might appear patchy if they have variation in texture. Using paint that is not fully mixed can cause a patchy appearance.
If your roller runs dry, you'll find yourself with uneven patches, leaving your walls looking inconsistent. Also resist the urge to rework wet paint and trust the process… it will look patchy whilst drying! Another common culprit in achieving a patchy effect is not maintaining a wet edge whist cutting in.
First, wet sand with low grit sandpaper that can be used both wet and dry. Then apply rubbing compound to the coat. Next, wipe away excess clear glaze with a microfiber cloth. This process gets rid of any imperfections and makes the coat look new again.
Applying the second coat too early will result in lost time, money, and effort. Not only that but it'll also create additional stress that's not necessary. Applying the second coat too early will result in streaks, peeling paint, and uneven color.
Your paint may be too thick. Whether you are spraying, brushing or rolling, the consistency of your paint is essential. When spraying, I always add 1-2 ounces of water for every 10 ounces or so of paint. When brushing, I use a mister to spray a light mist of water onto the surface when doing my final long strokes.
If you run into uneven or blotchy paint, the best thing to do is start over. The first crucial step in getting back on track is to prime the area you're painting. Once your primer is dry, begin painting—this time knowing that you've primed your surface and set your project up for success.
Color Consistency
To prevent this from happening, make sure whatever paints you're using get properly stirred before you pour them into trays. This helps you get the even color that you want.
The best way to make sure each coat of paint dries evenly is to use the right tools and apply a thin, even layer of paint with each coat. Using a paint roller will help distribute paint evenly and apply a thinner layer than a brush, which often holds more paint than needed, leading to unwanted drips.
Dilute the paint by 5 to 10 percent with water for latex-based paint or mineral spirits for oil-based paint. Stored paints can lose moisture, making it more difficult for touch-ups to match the original coat.
Using Dark Color Paint:
Just like the same way, flat finishes reduce dent visibility; darker paints also reflect less light than lighter paints. This makes them a better choice for hiding drywall imperfections. The only drawback of using dark color paint often makes the room look smaller.
Latex paint requires at least four hours before you can add another coat. Wait at least eight to 12 hours before adding another coat of acrylic paint. Oil-based paints require at least 24 hours before you can apply another coat.
Unfortunately, roller marks will probably not go away when the paint dries out. However, as the paint dries some of the roller marks will become slightly less noticeable. But simply waiting until the paint has dried won't solve the problem completely.
It's recommended to wait at least 24 hours before adding a coat of paint over your primer. Painting over it soon could cause your paint to adhere to the wall improperly, flaking and peeling.