Prime all surface areas to be painted with an acrylic direct to metal primer.
Painting steel barn siding.
Start at the top of the wall and across the length of the metal siding.
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Use a paint paddle to stir paint up from the bottom of the can.
Put on your safety goggles and a fine particle mask.
A new paint job was the solution.
Water based paint forces moisture up to the surface and replaces it with rust proof chemicals to seal the surface.
You can also use oil based alkyd paint but.
To ensure uniform color intermix all containers of the same color.
When ready pour the primer into the paint container on the sprayer or pour the primer into the paint tray.
Manufacturers advise applying at 50 degrees f and rising with no rain in the near term forecast.
Make sure surface is clean dry and sound.
Application paint only when surface and air temperatures are 50 90 f 10 32 c.
Then apply the primer to the metal siding in even strokes.
Use your airless paint sprayer to prime all large surface areas.
You may see a slight watery sheen on the top of the paint.
The aluminum siding was a shade of beige that had aged into a dull mustard tone and the trim was a rust colored reddish brown.
The homeowners hated the look but the metal was still in decent shape and they didn t want the expense of re siding the entire house.
For steel use a latex bonding primer instead of a regular metal paint primer.
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.