If it s quite old and rusty any primer for metal followed by any outdoor paint designed for metal is probably okay although a rust converter affil.
Painting rusty metal roof.
Getting a rusty metal object ready for painting takes a bit of work but it s totally doable.
Brushes and roller for priming rust spots 4.
Painting rusty metal items versus replacing them is a win for your wallet.
Access the rusted galvanized metal roof using an extension ladder.
Paint can t bond to rust so you ll need to start by restoring the surface.
Avoid painting in the rain as this could wash your paint away.
Wash the metal roof using trisodium phosphate in water at a ratio of 1 cup tsp per 1 gallon water.
Applying the new paint 1.
Painting a rusted metal roof step 1.
For spots that are very badly rusted or too delicate or detailed to clean thoroughly use a product like rust oleum rust reformer which soaks into the rust and changes it into a non rusting paintable surface photo 3.
Apply a primer to.
If possible try to.
Wait a full 24 hours for the roof to dry.
Use a paintbrush or a paint roller to spread the primer.
Apply a coat of primer to the entire roof.
Scrape rust from the roof using a wire.
Once done you can paint.
Once done you can paint over rust.
How to prepare a rusted galvanized metal roof for painting step 1.
Link to product info on amazon first might be a good idea.
Elbow grease will do the trick for lightly rusted metal but tougher jobs may require a power sander or chemicals.
Add up the costs of a 12 ounce spray can of rust conversion primer and a 12 ounce can of metal paint that each cover.
Choose a day with good weather.
Scrub the rust away using a stiff wire brush.
Wait at least an hour for.
You can also use oil based alkyd paint but.
Can i paint over a rusted roof.
Airless spray unit to coat the entire roof.
Wash the galvanized metal using a pressure washer.
Wire brush and power tools 2.
This will remove flaking rust and as much of the surface rust as.
Painted metal roofs come with a baked on factory finish and you can re coat these as well as paint bare metal roofing with acrylic latex paint.