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. House Painting Arvada
If you have two weeks, a ladder and some experience, this makes an excellent DIY project. On most surfaces, it is forgiving of mistakes and easy to work with. Correcting mistakes only adds more time and not much more expense. However, a professional will get it done faster and with a better finish. If you don’t have 2 to 3 weeks to spare, find a professional painter near you today.