Dirt/Contamination
Any dirt or contamination of a surface will impair the adhesion of the paint coating. The only solution to this, is to remove all the contamination prior to painting.
Flaking Paint
If the surface has been previously painted, some detaching of paint from the surface may occur. Prior to applying a further coat of paint, all loose and flaking paint must be removed.
Rusting
Rusting is an orange/brown deposit which forms on metal surfaces. Prior to painting, all rusting should be removed and the substrate coated with an appropriate metal primer prior to painting.
Greasy
When working with galvanised steel, occasionally a greasy residue may be left on the surface as a result of the galvanising process. If this occurs, the surface should be swabbed down with Cleaner & Degreaser until all grease is removed.
Shiny Surface
When working with galvanised steel, occasionally the surface can be very shiny as a result of the galvanising process. If this occurs, Mordant Solution should be applied to the surface prior to painting.
The above is the example for the first or the 4 substrate headers. Do you think this is feasible to do?
If so, I can send you the detail for all the rest in spreadsheet format if required or if not in a Word document