The guide teaches you how to make wall repairs disappear from first glance to raking light. Chapter 1 builds safe habits and tool control for tiny fixes like nail pops, picture-hook holes, and shallow dents. You learn to bevel ragged edges, apply thin controlled fills, feather with a four- and six-inch knife, and sand in stages using one hundred twenty and two hundred twenty grit until the surface reads flat by touch and light. Chapter 2 scales up to mid-size damage. You square the hole, add solid backing, match board thickness, fasten the patch flush, and tape seams with paper or mesh. Then you run a three-coat system—bed, build, and finish skim—using wider knives and strict dry-time discipline, with checks by straightedge and raking light. Chapter 3 finishes the repair so it blends with the room. You spot-prime to seal and reveal flaws, match light textures like orange peel or knockdown, choose the right sheen, and blend paint with soft, expanding halos to avoid flashing and lap marks. The project closes with simple prevention: correct anchors, stud finding, door bumpers, and moisture control, plus a quick verification routine so your repair looks clean in morning and evening light.