For interior wall painting over old paint, you really should first hit it with a primer/sealer. It will give you a chemical barrier to prevent the old color from messing up the new color. However, don't worry about it looking perfect while applying or after it dries.
Comments Section This looks totally normal for one coat. Going from light to dark takes a minimum of two coats to look good, often three coats. Make sure you don't overcompensate by loading too much paint on the roller, you will end up with ridges in the paint.
It will come out blotchy because many times it is very thin paint. Spread it on with no drips and let it dry well. You may want to apply multiple coats as needed. It typically will dry fast so you may be able to perform additional coats within an hour after first application.
But the most important coat of paint you apply is always your first! Get that wrong, or use the wrong product, then your whole system fails.
Having paint streak is very common when not applying enough material, or using tools that don't hold enough material to disperse it properly. You want to make sure the roller has a uniform amount of paint on it while rolling, if it starts ``screaming'' at you on the wall, there's not enough paint left on the roller.
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.
Wet Film Thickness: This is the thickness of the paint when it's first applied, while it is still wet. Most paints require between 3-5 mils per coat.
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.
Always cut in first then continue painting with a roller. Cut in and paint with a roller one wall at a time. If you cut in all areas first and then roll the entire room, the paint that was applied when cutting in will have dried quicker and you will be left with a patchy, uneven finish.
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.
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.
These can occur when the paint roller isn't fully immersed in the paint or is applied unevenly, leaving a patchy, streaky appearance once the paint has dried. Second, brush marks are another common cause of streaks.
Don't worry if the wall looks patchy at first – this is normal for claypaint. Wait a few hours and you will notice that the colour evens out as it dries (dark colours take much longer to settle to their final colour). We advise that you wait until the colour has settled before applying subsequent coats.
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.
Recoat Time for Oil-Based Paint
Water-based paints dry considerably faster than oil-based paints because the water evaporates to let the paint dry. Oil-based paints contain no water. Though oil-based paint may feel dry after only a few hours, it's best to wait a full 24 hours or more before applying additional coats.
Painting recoat times will vary considerably, taking only 1-2 hours for flat latex paint to 24 hours for oil based paint.
The Walls Were Not Prepped or Primed Properly
Sometimes, paint streaks aren't caused by poor technique, inconsistent coverage, or too much paint. If your walls aren't prepped properly, then the paint might have trouble adhering to the wall's surface. This can lead to clumps, drips, and paint streaks.
There are several ways to determine whether a surface is dry: OIL BASED products are dry if they are no longer tacky and do not emit a smell. WATER BASED products are dry if they no longer feel cool to the touch and a powder will form with light sanding.
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.
On average, you can get about 400 square feet out of one gallon of paint. For an easy perspective, one gallon would likely cover a bathroom or small bedroom. But keep in mind that most rooms require more than one coat of paint. So if your room needs 2 coats, plan on getting around 200 square feet out of a gallon.
When paint is wet, it tends to appear darker due to less light reflection. But as it dries, the water evaporates, causing the paint's hues to lighten up. Oil, acrylic, and latex paints are exceptions to this, appearing darker as they dry.
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.