Yes, but it's not as good as drywall primer, and will probably give less coverage.
Yes, you can.
A good oil based primer, then an oil based concrete paint.
You have a contradiction ! - Latex primer CAN NOT BE oil based.
You can paint over your old primer, just make sure to clean your wall with TSP. And for your second question, to paint over your concrete wall you wanna make sure it's primed to seal all the pores in the concrete.
It is not necessary to use a primer for interior walls, but using one helps with adhesion and smoothness of the paint.
PVA is a better primer for new drywall. Do you need it, not really. Any good latex primer will do the job just as well. I guess it really just depends on what you expect your primer to do. Cheap primers will seal the drywall, but not much more. I find bonding primers and pva primers will provide a much more solid platform for topcoats. They may cost more and be a little overkill, but they will provide you with layer of primer that will allow your topcoat to dry in even. You can also dry a high build primer, which is the product I prefer to use. They give you a great platform to work from, and since they are usually about 3 mils thicker that standard primer, they fill in a lost of voids in your wall. If you go with this kind of primer, it is best to spray it. You really can't achieve the mil build up you need from a brush and roller application. If you use the roller application, and are worried about really sealing the wall and filling voids, I would recommend two coats of primer.
A good oil based primer, then an oil based concrete paint.
You have a contradiction ! - Latex primer CAN NOT BE oil based.
There is a type of silicone caulking compound which is specifically designed to be used with concrete; this will work to attach insulation (but only if the concrete is DRY).
You can paint over your old primer, just make sure to clean your wall with TSP. And for your second question, to paint over your concrete wall you wanna make sure it's primed to seal all the pores in the concrete.
It is not necessary to use a primer for interior walls, but using one helps with adhesion and smoothness of the paint.
It is possible to use a dirt wall when pouring concrete, but the liquid of the concrete will not make neat edges. The wall must be tamped firmly. This will work on shorter projects, but not on taller ones.
PVA is a better primer for new drywall. Do you need it, not really. Any good latex primer will do the job just as well. I guess it really just depends on what you expect your primer to do. Cheap primers will seal the drywall, but not much more. I find bonding primers and pva primers will provide a much more solid platform for topcoats. They may cost more and be a little overkill, but they will provide you with layer of primer that will allow your topcoat to dry in even. You can also dry a high build primer, which is the product I prefer to use. They give you a great platform to work from, and since they are usually about 3 mils thicker that standard primer, they fill in a lost of voids in your wall. If you go with this kind of primer, it is best to spray it. You really can't achieve the mil build up you need from a brush and roller application. If you use the roller application, and are worried about really sealing the wall and filling voids, I would recommend two coats of primer.
yes Yes, an oil paint will adhere to latex. It doesn't work in reverse, latex will not adhere to oil that is dry, but oil adheres to dry latex. If you were a purist, though, you would sand down the woodwork before repainting it. That would give the best result.
If the white is glossy, I would use a white primer. If not,then I would put paint colour directly/
Yes, you can.
Well it's better than nothing, but quite possibly not as thick or well covering as primer is. If your wall is already white or even a pale colour, it won't make a lot of difference. If the wall is new drywall, or a dark colour you shouldn't use this.
You should carefully inspect the wall board for any damage. If the paper "skin" of the wall board has peeled off with the wall paper, you will have to patch that before you can paint. Otherwise, I would recommend a good quality latex primer.