There are a variety of reasons why you would want to paint a surface. It could be to beautify your project with color or can be to protect the underlying surface. No matter you're your reason, preparation is an important step when taking on a paint spraying project. Preparing the surface to be painted ensures that the paint will adhere to the surface. This adherence will make a difference in whether you get a perfect finish or not. There are different preparation methods depending on the type of material that is to be painted.
Preparing wood products for paint spraying can take time but the end result will make it well worth the time. Wood is porous so paint will generally adhere to it fairly easily but you want to be sure that the surface is smooth. To accomplish a smooth wood surface you will need to sand the wood. Depending on the size of your surface, it can take quite a bit of sandpaper to complete your project. Sanding can be done by hand or can be done with an electric or battery powered sander.
Start sanding your wood with coarse grit sandpaper. To determine the grit size of your sandpaper just remember that coarser grit sandpaper will have a lower number than finer grit sandpaper. You want to sand the surface area in a back and forth motion or a side to side motion. Next you want to move to medium grit sandpaper and sand the entire surface in the same manner you did previously. Lastly, use fine grit sandpaper to finish up your preparation. By the time you are finished you should have a smooth surface free of imperfections.
Preparing metal for paint spraying is quite the opposite of preparing wood. Unlike with wood, metals are non-porous. This means that the paint will need something to grab onto when its applied. You can give your metal surface something to grab on to by sanding the surface with medium grit sandpaper. This roughens the surface of the metal to allow paint to adhere better and give you a smooth finish. Do not worry about it not looking smooth before painting it because the paint will fill in the areas where you sanded.
Another preparation method used for some materials before paint spraying is the use of a primer. Primer works in two ways. Primer can cover up a darker color paint to allow for a lighter coat to be applied without having to strip or clean the old color. It also serves to give something for the paint to adhere to. This is important as mentioned above for metal and also some non-porous plastics. Primer can be applied with paint spraying equipment or can be applied in the traditional method with a brush or roller.
Proper preparation of your surfaces before paint spraying them will ensure that the paint adheres properly. Proper adhesion will help you achieve that smooth, beautiful painted finish that you want for your project.
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