Suede cannot be polished, of course, but the color can fade and become dusty-looking in spots, and the nap can become shiny from wear. Because suede is a porous material, suede shoes are best worn on dry days.
To clean it, sponge very lightly and gently with a shampoo formulated especially for suede. Then, brush gently with a rubber, nylon, or brass-wire brush made to raise the nap of the shoe. This will also remove dirt and mud. Use a suede conditioner, available at shoe-repair shops, to rejuvenate color.
Comments