Small random-orbit or pad sanders make this job go faster. (Wallis first covers these boundaries with Synkoloid patching compound so no edge is visible after sanding.) As shown, you want to make sure that there is a feathered, smooth transition from exposed wood to old paint. For areas that might get close scrutiny, you can follow up with a 100- or 120-grit rubdown to erase any scratches.
First, if you need it, we have it — all the paint for you home — every color you can imagine, in the finish you need, for every surface. Second, we’ can help narrow down your wall paint color choice until you decide on the right paint for your project. Of course, our paint associates at your local store can help pick our paint for your home. Pick up some paint swatches or order paint samples online so you can picture what it will look like.