![]() Here is a quick video that explains the process: Make sure to move the sandpaper in small, circular motions to remove the flaking and achieve a smooth surface. It is important to wait for the paint to dry before attempting to fix it. If crackling still occurs, lightly sand the surface and then apply a thin layer of primer before reapplying spray paint. ![]() Then, clean and prime the surface and then buff again. Start by buffing out the crackled parts with a piece of medium or fine sandpaper. To repair your spray paint crackle, you’ll have to do a bit of sanding and then touch up the area with a fresh coat or two of paint. Yes, it’s more inconvenient and preferable to avoid, but don’t get panic if you see some crackling. In most situations, spray-paint crackling is simple to fix, if annoying. When applying more than one coat at a time, make sure to give each of them enough time to dry before adding another layer. The speed at which your paint dries will depend on the temperature, humidity, and type of paint used. To avoid this issue, always wait long enough in between coats, about 5-20 minutes. Why does spray paint crackle? How to prevent it Failure to dry paint between coatsįinally, our last reason involves patience.Īlthough spray paint promises a quicker and easier way to paint, you still have to exercise patience throughout the process.įailure to let spray paint dry properly in between coats of paint can cause crackling because the paint is drying at different rates, ripping and tearing as it dries. Also, be sure to let the paint dry fully in between coats of paint. To avoid this issue, always use more light coats of paint rather than fewer heavy coats of paint. This uneven drying can cause the paint to move, ripping it and crackling it as it dries. However, when you use too much spray paint, then the paint will dry unevenly – the top of the paint will dry quickly because it is exposed to air, while the bottom of the paint will dry slower. While it is easy to see when you used too much paint on vertical surfaces (the paint will drip or run down), horizontal paint application issues are harder to notice because the paint will still lie flat. The final likely cause of your spray paint crackling is that you used too much paint, especially on flat horizontal surfaces. To avoid this issue, you can bring your project inside, use dehumidifiers, or even use hot air guns to dry any surfaces that need to be painted. As the paint dries unevenly, it will cause crackling on the surface. Spray painting in areas of high humidity or spray painting objects that are slightly moist will prevent the paint from drying or adhering to the surface properly. It shouldn’t shock you, then, to hear that too much humidity or moisture in the air can actually cause problems with spray paint. If I told you that pouring water in your paint would probably cause problems, you likely wouldn’t be too surprised. Be sure to mix your spray paint can for longer than usual and keep the paint stored inside a warm place before you need it. To avoid this issue, try bringing your project inside to warm up or place heaters around the project outside. What’s more, when the surface you are painting is too cold, the paint will have a hard time adhering, especially something like metal. If you use spray paint at temperatures below about 50☏, you can have problems with paint failing to mix inside the can properly or even spray out correctly, leading to problems with the paint itself. On the other end of the spectrum, spray paint also struggles when the temperature outside is too cold. Use a temperature gun or other thermometer to check the surface temperature of the material you are about to paint before you get started. To avoid this issue, try bringing your project inside or at least sit it in the shade outside for a while to bring the temperature down. When the paint dries too quickly, it is likely to crack on the surface. If you use spray paint above about 90☏, the paint will dry too quickly because the solvents mixed inside the paint will evaporate before the paint has had time to settle and dry. Any higher or lower than this and you’ll run into problems. In fact, according to spray paint manufacturer Krylon, the best temperature to use spray paint is between 50☏ and 90☏. That’s because paint works best under certain conditions. If you ever look at the back of a spray paint can, you’ll notice that there is always a ‘recommended temperature range’ when it comes to actually spraying the paint. Here are the most common reasons why spray paint crackles:
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