For a faster fix, try a skin-tone camouflage pencil, such as Judith August The Everything Pencil ($16, judithaugustcosmetics.com). Use a makeup sponge to dab edges and seamlessly blend the concealer into the skin.
Use your hands to blend. Linter suggests "a massage motion. Work in long, light strokes from thigh to toes, then go back and forth and around so the color looks seamless." Let the makeup dry for five minutes.