If you use a 100% acrylic primer on bare drywall, you should have no problem with top coating it with any sheen wall paint. Many flats are self priming on bare drywall though, so you may be able to save some money there. Just ask the paint store what the recommended primer is to determine what the most economical solution is.
For exterior work, use a block fill primer for bare block, a hot stucco primer for new masonry less than a month old with a pH of 13 or less (check with a pH pencil) or a 100% acrylic exterior primer for any bare wood surface or bare masonry surface over 30 days old.
If it's the standard light gray primer it should be alright.
"Drywall primer" -Yes, -it's called exactly that -right on the can !
percussion
It would if you put on a good latex primer first.
New galvanized what ? -Are you talking about galv steel framing ? If so it need no priming. Steel studs are within the wall and do not need any kind of primer or paint.
As long as the surface is clean and dull, then either an oil or acrylic primer can be used to cover oil-based paints.
Because it will avoid problems withold oil-based paint (you ABSOLUTELY need a primer over an oil-based paint before painting with water-based/acrylic pain)patches made of different material (patches of plaster for example) that would react differently from other parts of the wallbare surfaces (new walls) which won't give good adherencecolour changes (if painting over walls of different colours, the result will look different with the first layer(s) of paint. The primer can help)
The type of foundations that should be used in earthquake-prone areas are solid foundations mainly made from concrete. These are commonly known as shear walls and tend to be firm.
The answer is GESSO, which is a base or primer used in painting.
Drywall primer should be used.
I would sand it down with sand paper then paint with primer. After that apply a outdoor paint. Prep work should be smooth If you really want it to be nice hit the primer with a light sandpaper after the primer coat.
If the primer was a water based primer, then you are in trouble. If it was, then you need to strip it down to the metal and use either an oil based primer or I would use a primer made by Rustoleum.