Rui Fute corrosion rust metal roof renovation system consists of: heavy-duty base layer coating (particularly severe corrosion sites) dedicated grassroots anti-corrosion coating + special anti-corrosion coating surface corrosion special surface coatings construction steps: Step one: grassroots cleaning, sanding and rust ; Step two: dedicated grassroots anti-corrosion coating construction (particularly severe corrosion site must first use of heavy-duty spray paint grassroots treatment); the third step: Corrosion special surface coatings sprayed twice, the final film thickness is 0.32mm.