The secret to painting galvanized steel is white vinegar.
How to paint a galvanized steel garage door.
Rinse thoroughly and let dry.
Open the paint tin and stir with a suitable spatula for about a minute to even out the colour.
Re apply several coats of paint until the metal is completely coloured with no metal shining through.
Apply paint purchase a can of acrylic paint in your desired color.
Lay a drop cloth in the area where you will be painting.
Paint on using a brush or roller can also be sprayed primer and topcoat in one use the appropriate primer below on bare mild steel galvanised steel zinc and aluminium substrates quick drying touch dry in 2 hours typical coverage 10 3 m per litre.
Next you ll want to mask off any windows and hardware.
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Since darker colors absorb more heat which can lead to peeling you might want to stick with a lighter shade.
Clean the garage door s surface with a water based cleaner and a sponge.
Maybe a hot air gun in the answer have seen garage doors done successfully.
Next prime any bare spots with a latex primer designed for use on galvanized metal then topcoat the door with a high quality exterior acrylic latex paint.
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First prep the surface by removing any old flaking paint and cleaning with a degreaser or cleaner and a brush.
If you have a kitchen then you probably already have this handy solution.
Wait for at least 10 to 12 hours for the primer to dry thoroughly.
However i m told liquid paint stripper is useless now.
All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface.
I used a liquid paint stripper to do this in 2008 and the stuff just fell off.
Apply the latex paint in the same manner as the primer.
White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent.
Apply an even coat of primer to the entire surface of the door including handles and any knobs or bolts.