Sanding is required before painting to remove flaws (also known as pimples) and create a nice, smooth finish while also developing adhesion by producing tiny, rough ridges for the paint to adhere to.
Choosing the appropriate sandpaper for woodworking, painting, or finishing project might make all of the difference; but deciding between the many different kinds of sanding pads may be difficult. Here are some pointers to help you pick out the finest sandpaper for your next job.
Sandpaper is graded numerically from 0 to 400, with lower numbers representing coarser grits and higher numbers representing finer sandpapers.
Start with the finest sandpaper that will perform the task well, then move to finer grits if needed. Here are some popular sandpaper grit sizes, as well as ideas for using them on various projects.
Coarse grit sandpaper is excellent for rough sanding and removing stock quickly, as in the case of sanding the edge of a sticking door with a belt sander.
For most purposes, coarse sandpaper is an excellent place to start, from rough wood to removing old varnish.
Use finer grit sandpaper to remove the gouges generated by coarser grits on unfinished wood and to lightly sand between coats of paint.
Sandpaper with a fine-grit is used for light sanding between coats of paint, as well as metal and other hard surfaces.
How Much Should You Sand?
The most challenging sanding job is to make sure you’ve taken care of all flaws and scratches from each preceding grit before moving on to the next. Most of us sand more than we need because we’re not sure if these flaws and scars have been removed.
When you’ve sanded enough, learning comes from experience. There are, however, two methods that may assist you. Take a close look at the wood in a low-angle reflected light, such as from a window or a light fixture on a stand, after removing the dust. Second, dampen the wood and examine it from various angles while reflecting light off of it.
Sanding is a time-consuming operation, and it may appear to be an endless one. If you don’t sand properly, any flaws will be accentuated when the final finish coat is applied.
The warm, rich glow of a wood floor, the smoothness of a freshly painted wall or ceiling, and the high sheen of a recently varnished table are all signs that an activity has been completed correctly. All of these are possible due to careful sanding.