Use a small amount of top coat on the paintbrush so it spreads thinly on the gutters.
How to paint gutters with a brush.
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.
Apply a thin layer of top coat with a paintbrush or a sprayer.
You will need to use soap and water to get your gutters spotless.
You can also apply a thin layer of top coat with a paint sprayer if you d prefer.
Correct any runs in the paint using the brush.
If the gutters are not clean before you paint them the paint will not stick.