If you want the most professional-worthy paint job possible, sanding your walls really is a must. Not only does it smooth out your surface for an even application, but it helps your paint to adhere properly for a longer-lasting finish. Something we often fail to consider, however, is what grade of sandpaper grit is best for the task.
For a less experienced DIYer, the hardware store's sandpaper aisle can be an overwhelming place, with numerous different grit scales to wrap your head around. Picking the right type depends on a variety of factors, such as the type of surface you're sanding and whether you want a light or heavy sand, and it really can be the difference between a decent paint project and a shoddy one.
