On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it.
Best primer for galvanised gutters.
Start by cleaning off dirt and debris on the gutters.
Allow the first coat of primer to dry and apply a second coat.
The key to repainting aluminum gutters and downspouts is making sure they re clean and that you use the right primer if you use a common paint that contains ammonia.
Use a latex based primer.
You can stand on a ladder if you d like to get closer to the gutters to clean them.
For the best possible paint job it s wise to apply a corrosion resistant metal primer to galvanized gutters and downspouts but if no rust was found a primer isn t absolutely necessary if you are applying 100 acrylic latex paint.
Whichever one you want to use is fine so long as it is ammonia free.
Ammonia can create gas bubbles within the paint which a look horrendous and b can create unreliable paint jobs.
You do not have to worry too much about neatness as hardly anyone is ever going to see your handy work.
Rent a power washer or buy one at your local hardware store or online.
The power washer will have an extendable arm making it easy and quick for you to clean the gutters.
Use a power washer to clean the gutters fast.
Pressure washing the gutters and downspouts and the rest of your exterior surfaces is simply not the best way to get them ready to paint.
The next step is to prime the galvanized gutters prior to the top coat of paint.
For applying primer onto an aluminum gutter you have two options.
Apply the primer over all areas of the gutter with a large paintbrush.
Does pressure washing get rid of all dirt.