Check out any 'design on a budget' book. When pursuing the question "what's the biggest 'bang for your buck' in home decor?" the authors will almost always answer, "a $20.00 can of paint." And is turns out, they're right.
Case in point: Maddylane's rainbow-coated garden furniture redo, with a lovely chocolate trim. Just look at the photo below for the contrast in color and texture. The worn, water-soaked wood from before looks dingy and dangerous, but with the bright splash of the spectrum, a monumental shift.