Posted by 1 year ago. Strain old paint through a paint strainer or a pair of tights. Same results in all cases. Hold the spray can about 12" away from the object you are painting and keep the can moving. The paint isn’t new but is only about a year old. To fix them, wait until the paint has dried, then scrape the drips off the wall with a paint scraper and sand the area smooth. Always paint with clean brushes and use a paint kettle. The fix. If it's too big to hold this way, hold it by the handle like a tennis racket. New paint brush is clumping. When a gritty surface is dry, rub down with a damp wet-and-dry abrasive paper until it is smooth, wipe clean, then apply a new coat of paint. Painting Interior Walls ... pulling away only at the very end of the stroke to avoid clumping. Many times, a lot of do-it-yourselfers find themselves having to stop painting every few minutes to remove these clumps from their paint. 2. Use a paint shield or piece of card to guard against picking up dirt from a floor. Usually, lumps on the walls I paint are due to paint splatter from the brush roller, as I paint a nearby area. Luckily, you can solve this problem with the help of a simple paint strainer. This will remove the excess paint and make your wall look smooth. You are probably too close to the object being painted or you are applying too much paint at a time. Synthetic short-napped roller covers (1/4 inch) work best on most walls, ceilings, and trim. The handle should rest in the crook of your thumb, and your thumb and fingers should be grasping the metal band around the bristles. Keep the paint brush you used for cutting in near you during this step. The second time I did the same, so I don't think it's the primer drying out or anything like that. How to Tell if Latex Paint Has Gone Bad. Viewing colors on a small paint swatch can give a different visual impact than seeing them on a large wall. Repaint the section carefully, blending it in with the rest of the wall. As you paint, the brush picks up pieces of debris that inevitably make their way back into the source can. Sometimes this paint contains contaminants such as dirt, small bits of wood or dried pieces of coagulated paint. Using two or three light coats will give you a better finish and dry quicker. Large surfaces tend to intensify color, and you might end up with a louder color than you intended. If you notice paint clumping up in the edges between panels, swipe down with the paint brush. Painting a room with bad latex paint … The first time I primed I poured into a tray and put the lid back on tight. Harder to paint in all the details of my cabinet doors. Usually I catch these, but after the paint dries, I find 5-10 or so. If you stop moving, the paint will be thicker there and tend to run. I knock them down with a sanding sponge, and retouch with paint. 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