The Best Way To Clean Your Drywall Knives

Patches made with traditional patching materials need to be primed with a sealing-type primer before painting. Otherwise the patched areas could show through the finished paint job as foggy spots. But if you patch with a self-priming patching material, you can avoid this extra step. There are several brands; just look for the words 'self-priming' or 'with primer' on the container.

It's fine to fill screw holes and other small wall dings with patching compound, but for dime-size and larger drywall repairs, and for holes that are deep, it's best to use a joint compound that sets up by a chemical reaction. These are available in powder form with setting times ranging from five to 90 minutes. The reaction starts when you mix in the water, and the compound hardens in the specified time. The five-minute version is nice because you can buy the powder in a convenient 5-lb. box, and the compound hardens quickly, so you can apply another coat right away. Remember, setting-type compounds are harder to sand than regular patching materials, so make sure to strike them off flush to the surface when you fill the hole. You'll find setting-type compounds wherever drywall taping supplies are sold.

Stress cracks usually show up around window and door openings. The cracks are the result of framing movement and are hard to fix permanently. But using spray-on crack repair is a good way to at least extend the life of your repair. The spray forms a flexible membrane over the crack that can stretch and relax as the building moves. If the crack is open, fill it first with patching compound. Then follow the instructions on the can to cover the crack with the crack-repair spray. Let it dry and cover it with paint to finish the repair. You'll find crack-repair spray at hardware stores, paint stores or online.

Professional drywall tapers always fill a row of screw holes with one long stripe of joint compound, rather than filling every screw hole separately. In addition to being faster, this method disguises the screw holes better and makes it easier to sand the patch. Instead of sanding around each hole, you can just sand the whole stripe. You can take advantage of this tip whenever you're filling a series of holes that are lined up and close together, like the holes left from a shelf standard or a row of pictures. Use a 6-in.-wide putty knife and apply the compound as shown in the two photos.

In areas with a lot of dents and holes, like in the mudroom where boots, hockey sticks and golf club bags leave their marks, don't try to fill every dent individually. Instead get a wider taping knife—a 6-in.-wide putty knife will do—and simply skim the entire area with joint compound. For the best results, use 'topping' or 'all-purpose' joint compound. Mix a tablespoon or two of water into three or four cups of the joint compound to make it easier to spread. Then put a few cups into a drywall pan and use your 6-in. knife to spread it. Spread a thin coat of joint compound over the area. Then scrape it off, leaving just enough to fill the recesses and holes. You may have to apply two or three coats to completely fill holes, but the thin layers dry quickly and are easy to apply. Sand the wall after the final coat dries.

When you peel off old adhesive or self-sticking picture hangers, you often tear off the top layer of drywall paper, leaving fuzzy brown paper exposed. If you try to patch over this without sealing it first, the water in the patching material will cause the paper to bubble and create an even bigger problem. The key to patching torn drywall paper is to seal it first with an oil- or shellac-based sealer (KILZ Original and BIN are two brands). These are available in spray cans or liquid that you can brush on. Don't use a water-based product or you'll likely have the same bubbling problem. After the sealer dries, sand the area lightly to remove the hardened paper fuzz. Then cover it with patching compound as you would for any other wall repair.

Orange peel texture on walls or ceilings is nice for hiding defects and adding interest, but it can be a real pain if you have to make a big patch. Luckily you can buy spray-on orange peel patch that will allow you to match the texture of the patch without hiring a pro. You can buy the patching material in a few different versions: regular, quick-drying and pro. The pro version gives you the most control over the spray pattern. Make sure to practice spraying the texture onto a scrap of drywall or cardboard to fine-tune your technique before you spray it on the wall patch. Let the test piece dry before you decide whether you need to adjust the nozzle for a coarser or finer texture. Remember, you can always add another coat if there's not enough texture after the first coat dries.