“Running through grits” not only means going from coarse to fine, but also matching the abrasive to the job. Before you stockpile any more sandpaper, make sure what you do buy (and apply) is the right stuff.
Not many people enjoy sanding. Even with powered equipment it can be hard, repetitive work. But it’s very important to have a smooth level surface on your projects. Not only does it look better when you apply the finish, it feels better to the touch. Everyone knows that you start with a low grit and work your way up.
Sandpaper is sandpaper, right? Not exactly. Each piece of sandpaper has finely (or not so
finely) ground particles of rock attached to it. The type of rock and the
substrate attaching it to the paper – and sometimes even the paper – can vary
greatly between products.