We just built a new house and I can personally tell you that it is a smart idea to use primer before you do any painting at all. Might seem like a step you could skip, but in the long run you'll be sorry. You will use more paint, and still will get a sparse coverage. Some people might disagree, but this is just my experience.
depending of the condition of the sheet metal before painting .just use the same of good automotive primer
painting and straining
yes because if not it it will rote
Paint primer is essential for many projects. If primer is sprayed onto the surface before painting, it will allow the paint to better adhere and create an even surface.
You have to use a good primer first.
Yes, it is essential to use specially designed primers on Aluminium, I recommend using Hammerite special metals primer before painting.
The benefits of primer is to solve common painting problems including stains on walls, moisture damage, old painted surfaces, odours, colour changes, and new exterior woods. Only two coats of primer should apply on the wall before painting is to be done. It is usually acceptable to use one coat of primer.
a primer is liquid you apply before painting , to help the paint stick to the surface that you are planning to paint.
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)
Yes with an acid etch primer acailable from leading auto paint retailers.
You prime it with drywall primer.
Yes, or it will take a lot of paint due to the fact that the osb will soak it up.