Gutter polish is a simple and effective treatment that will remove stains, dirt, grime, algae, and more from the exterior of your gutters. This treatment can revitalize and restore the exterior of gutters to their like-new condition. Gutter polishing can be performed during a normal roof cleaning and provides immense value and curb appeal. When gutters are looking dirty, weathered, or have black streaks along them— a gutter polishing may be in order. The gutter polish solution used by Valentine Roofing is safe and non-toxic to people, plants, and four-legged friends.