If it s a newer roof the galvanizing can definitely cause you adhesion problems.
Best paint for galvanized metal roof.
Galvanized metal requires either a zinc dust type paint or a latex paint.
Unfortunately over time this coating can fail leading to minor rust outbreaks.
Link to product info on amazon first might be a good idea.
Although you can.
My house was built circa 1880 and still has its original terne metal roof which consists of individual metal shingles with an embossed decorative pattern.
Metal roofing panels are often made of galvanized steel because it is resistant to water damage and is highly durable to impact.
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.
Galvanized metal roofs are coated with a layer of zinc that inhibits 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.
If you re not sure what kind of roof you have ask a professional roofer to inspect it before you paint it.
Apply the sherwin williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal.
After many years of exposure to the elements the paint on the roof began to wear off crack and peel necessitating.
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.