My walls are white now, do i have to prime them before i paint them a new color. what does prime do???

you don't have to prime but if you are painting a colour it will prevent you from having to paints lots and lots of coats because it helps seal the wallMy walls are white now, do i have to prime them before i paint them a new color. what does prime do???
If the walls are Gloss paint now- they need primer.

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My walls are white now, do i have to prime them before i paint them a new color. what does prime do???
Primer merely prepares your wall to accept the new paint...light to dark or dark to light. In the even that it's been necessary to make quite a few repairs in the plaster, it will also help dimish them under your fresh paint. Just a note, but when I'm painting a darker color over the white, I have the primer tinted to match the paint color.
You shouldn't have to prime as what that does is help to cover over the original color when changing colors. Most primers are white based (unless you have them tinted). I would think the worst that would happen is you have to paint twice if your paint doesn't cover the white.....but that would be the same as priming with the new color anyways. Be sure the walls are clean of of grease, dirt or oil as the new paint won't stick to that well.
Since they are already white you don't have to prime them. If you want you can take a sheet of medium sandpaper %26amp; lightly wipe the walls. This will help the new paint stick but todays paints are so good you really can skip that step.





Get a good quality paint. You may have to use two coats but you can decide after the first coat dries.
Yes always prime you can tint your primer


close to your color so it will help on


cover with finish coat.


10x10 8ft wall # 1 gallon( warranty cover )
I would use a primer anyway, no matter what color your walls are currently - it helps the new paint adhere to the existing paintable surface.
no.
No. Give them 2 coats of GOOD paint, no cheap stuff, and see how it looks. Wash them down first to get rid of any dust, dirt. Dark or greasy stains might need a primer to seal them so they don't show through. Prime if the walls are unfinished, have a glossy paint already, unfinished wood, etc. Priming seals so that the paint doesn't soak into unfinished drywall, porous surfaces, seals dark spots, seals wood so that natural resins in the wood don't bleed through, helps paint to stick to glossy surfaces.
Primer makes the paint not bleed through. If your walls are white now, you won't have any problems painting it any color you want. Just slap the paint on.
You only have to prime areas which need to be sealed up, for instance over patching. Or in areas where you might have an adhesion problem. If you are painting a latex wall paint over another latex house paint, you generally don't need to prime. The one major exception is if you're going over really cheap flat paint. Sometimes cheap flat paint sucks in the next coat to go over it, giving it a spotty sheen. In cases like that, you will need to prime to seal up the cheap paint.
primer seals the surface you are trying to paint.So if there's already paint there i would only use primer if the color you are going to paint is lighter than the color on the wall
You can sand paper them down but you really don't have to unless they're are rough.