Do this as soon as any spots start to show the steel underneath or do it a little sooner if you are trying to sell your house.
Painting steel house siding.
It also helps to peel away the previous paint on the steel siding leaving it neat and clean.
Depends on the weather but three or four or five hours is not unusual.
Start at the top of the wall and across the length of the metal siding.
But i would use the oil based rust oleum primer which by the way takes forever to dry.
Paint the steel siding panels using the sprayer.
Then apply the primer to the metal siding in even strokes.
Aim the sprayer nozzle directly at the panels eight inches from the siding surface.
Cleaning of the surface can be done by hand washing with warm soapy water or with the use of a high pressure washer 2500 psi minimum.
That is how you can get the paint to adhere to steel siding.
And then i would use the rust oleum top coat.
The first step includes cleaning.
When this happens the metal is exposed to the elements and will start to eventually rust.
The first sign that this is beginning to happen is a loss of the glossy look that new siding has.
When ready pour the primer into the paint container on the sprayer or pour the primer into the paint tray.
Since any of this is clearly bad for your metal siding it is vital that you re paint your metal siding.
For steel use a latex bonding primer instead of a regular metal paint primer.
This will help clean away all the dirt that accumulates on the steel siding.
Trigger the sprayer to begin the paint flow and use a back and forth motion to cover the length of the panel with an even coat of paint.
As with all exterior painting projects proper surface preparation is the key to restoring your metal siding.
Step 1 clean the steel siding.