Here is a picture of a project we did last year.
Painting steel siding primer.
I would use the red rust oleum primer the oil based primer and i would let it thoroughly dry after you knock off all the loose paint and sand it and make sure the surface is ready to accept it.
Then put the paint of your desired color in the rolling pan and cover your paint roller with the paint.
You mix it with water scrub down the areas to be painted with a stiff bristled brush and rinse it all clean.
But i would use the oil based rust oleum primer which by the way takes forever to.
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.
If you did not do a good job of scraping off the old paint or there is chalking that you can t get to come off then you should first paint with a primer.
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.
Spray paint cans offer more complete coverage of irregular surfaces.
Keep in mind that exposing water based paint directly to metal can rust it so apply an oil based primer before application.
Wait until the primer is dried.
This will provide you with an additional layer before the layers of paint are applied.
Then apply the primer to the metal siding in even strokes.
Start at the top of the wall and across the length of the metal siding.
It s a powder that is available at most box stores or paint stores.
As long as the siding is clean you won t need to use a primer unless raw metal is exposed.
A new paint job was the solution.
Metal shed painting 1 apply a rust inhibiting primer with a brush.
Finally since metal is such a good heat absorber avoid painting siding while it s getting direct sunlight.
The home has insulated steel siding but the original paint finish was severely worn.
Make sure you get into all the crevices around the surface of the shed.
For steel use a latex bonding primer instead of a regular metal paint primer.
Steel doors door frames and hand rails should be cleaned then primed with a rust inhibitive solvent based metal primer followed by a variety of topcoats.
These areas are subjected to a great deal of wear and abrasion so care should be taken when choosing a finish coat.
When ready pour the primer into the paint container on the sprayer or pour the primer into the paint tray.