Copper gutters are attractive, durable, rust-proof, and easy to maintain, but you may notice they start to fade. When copper oxidizes, a patina forms from the reaction between the copper and oxygen. Removing the patina can be tricky, but you still don't have to replace the gutters. Copper gutters can easily be restored by following these tips.
Prepare to Restore the Gutters
To restore copper gutters, gather:
plastic gloves extension ladder rags paper towels plastic scoop or trowel synthetic scrub pad or soft scrub brush buckets with ladder hooks white flour salt vinegar baking soda copper cleaning gel exterior metal paint and two-step metal primer (optional) Set an extension ladder on even ground, so you can reach the gutters comfortably, but don't lean the ladder against them to avoid dents The top of the ladder should come six inches over the gutters.