If you are not comfortable working on heights the best solution is to remove the gutter section by section and paint it on the safety of your grounds.
Diy painting metal gutters.
Apply paint stripping chemicals.
Sand the gutters with a medium.
Place over the hole.
If not cut a patch from the metal flashing that is just a bit bigger than your hole with your metal snips.
After the primer has fully dried to create the ideal painting canvas grab the brush and stir the paint.
Strip off the old paint with a plastic putty knife.
If you have a gutter patch you can use it.
Work in sections painting the inside of the gutter as well as the outside.
Stripping sanding and sealing 1.
Use an oil based metal primer and apply it per the product s directions.
Make sure your primer is ammonia free as a primer with ammonia could react with the aluminum causing gas bubbles to occur between the layers.
Leave the gutters where they are only if you feel 100 comfortable and have performed a diy job before.
The key to a long lasting paint job is to prime the gutters before painting them.
Use your putty knife and apply the asphalt flashing cement to the back of the piece you just cut or your patch.