For more see how to clean the outside of gutters.
How to paint gutters with a brush.
Brush carefully the braces first and then paint them too and leave them dry.
Apply a thin layer of top coat with a paintbrush or a sprayer.
Use a small amount of top coat on the paintbrush so it spreads thinly on the gutters.
Correct any runs in the paint using the brush.
You will need to use soap and water to get your gutters spotless.
The undercoat acts as a preparatory coating on the guttering surface increasing the stickiness and durability.
Use scrub brushes to get any dirt and grime embedded deep within the structure.