Hold the spray can about 12" away from the object you are painting and keep the can moving. Using two or three light coats will give you a better finish and dry quicker. The first time I primed I poured into a tray and put the lid back on tight. Viewing colors on a small paint swatch can give a different visual impact than seeing them on a large wall. 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. Painting Interior Walls ... pulling away only at the very end of the stroke to avoid clumping. Painting a room with bad latex paint … Use a paint shield or piece of card to guard against picking up dirt from a floor. 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. Paint thickening and clumping/running on wall- Need help!! You are probably too close to the object being painted or you are applying too much paint at a time. The fix. Make certain that leftover latex paint that has been in storage in your garage has not gone bad before using it. Keep the paint brush you used for cutting in near you during this step. 2. Large surfaces tend to intensify color, and you might end up with a louder color than you intended. New paint brush is clumping. Sometimes this paint contains contaminants such as dirt, small bits of wood or dried pieces of coagulated paint. If it's too big to hold this way, hold it by the handle like a tennis racket. Posted by 1 year ago. 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. Many times, a lot of do-it-yourselfers find themselves having to stop painting every few minutes to remove these clumps from their paint. Harder to paint in all the details of my cabinet doors. This will remove the excess paint and make your wall look smooth. We have tried two different cans of Sherwin Williams Cashmere and Kilz Primer. I knock them down with a sanding sponge, and retouch with paint. ... Really not sure why paint nor primer is sticking to wall. If you notice paint clumping up in the edges between panels, swipe down with the paint brush. Anne, it is always best to add the magically Magnetic paint additive to a white primer/sealer paint and paint enough coats on the wall to give you the desired magnetic pull and then sand the magnetic paint lightly with 000 sand paper when dry. 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. Don’t paint out of a can. Usually, lumps on the walls I paint are due to paint splatter from the brush roller, as I paint a nearby area. Always paint with clean brushes and use a paint kettle. 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