Restore Faded Vinyl Siding with Vinyl Renu The best way to restore faded vinyl siding is with Vinyl Renu. If your faded vinyl siding is discolored, oxidized (chalky) or covered with mold, mildew, algae then Vinyl Renu will help brighten the color and give your siding a like new appearance. Save Thousands of Dollars and Restore Faded Vinyl Siding? Over time the effects of weathering can greatly affect the beauty and integrity of your vinyl siding. Not only does oxidation (the primary cause of loss of color) create faded vinyl siding that has lost its color and luster but it aids in the breakdown of the vinyl itself making your faded vinyl siding more brittle and easier to crack. Vinyl Renu will also work on: (1) Faded Fiber Cement (2) Faded Aluminum/Steel Siding (3) Painted Cedar Shakes (4) Previously Painted Siding