Allow the primer to cure according to package instructions before proceeding.
What kind of paint to use on rusty metal roof.
Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface.
If you are preparing to paint a rusted galvanized metal roof pay special attention to surface preparation or you will have a recurrence of rust and or flaking.
Unfortunately over time this coating can fail leading to minor rust outbreaks.
Invest time to remove rust and to paint the shed.
Let the roof dry out thoroughly before applying noxyde coating.
Apply a primer to the roof using a wider sponge roller brush or a paint sprayer.
This will inhibit any more rust from spreading and will form a strong bond between the metal and the paint.
Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint.
Use a primer that is designed for metal and prevents rust.
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.
If you re not sure what kind of roof you have ask a professional roofer to inspect it before you paint it.
Unfortunately your question is just a bit vague because we don t know the age of the roof or why you are painting it.
To prevent damage it is important to prepare prime and repaint it before it accumulates rust.
To paint a metal roof you ll need to use an oil based paint if you have a terne metal roof or an acrylic based paint if you have a galvanized metal roof.
Galvanized metal roofs are coated with a layer of zinc that inhibits rust.
Large cans may be the most cost effective option when painting large linear metal objects such as fences and backsplashes but spray paints e g rust oleum hammered metal finish spray 8 74.
When choosing primer and paint pay for high quality materials to save money in the long term because your paint will last longer.
Instructions on how to paint over rust.
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.
Link to product info on amazon first might be a good idea.
Metal roofs do not need much maintenance other than an occasional cleaning and very occasionally a fresh coat of paint.
Here are tips to paint a rusty metal shed.