The best way to repair metal gutters is by using a sealant that will prevent the water from seeping through the cracks. You can buy a sealant at your local hardware store. Make sure to clean the surface of the gutter before applying the sealant. If there are any dents in the gutter, you can use a hammer and piece of metal to fix them. Once the sealant has dried, your gutter should be good as new!

There a few ways that you can repair metal gutters. You can use sealant or caulk to fill in any cracks or holes, or you can use a wire brush to clean off the rust and then use a paintable enamel to coat the gutter. Make sure that you allow the enamel to dry completely before using the gutter.