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What is the best primer to used under water based paint?
It's not the topcoat that's important, it's the surface the primer needs to adhere to.
How do you paint water based paint under acrylic paint?
. Acrylics ARE water based.
Is it necessary to use primer under interior wall paint?
It is not necessary to use a primer for interior walls, but using one helps with adhesion and smoothness of the paint.
Can you use a grey primer then paint white?
Besides a few shades of black, white primer will reflect more light back than a gray primer under a paint color that doesn't cover well. Gray is often used under dark reds which would normally require several coats of paint to cover, The lighi that would normally be reflected from a white primer underneath the paint is, instead, absorbed by the gray primer, giving the illusion of an opaque surface. White primer is used under any light paint that covers well. It can also be tinted to the color of many off white or pastel wall colors to help ensure coverage using fewer coats.
What kind of primer should you paint over oil based paint in order to then paint with water based paint?
This depends in large part on what paint or finish your are going to cover your oil-finish with. First, you need to determine, if possible, if your existing oil paint contains lead. If the oil paint is over 30 years old, you should assume that it has lead and the paint should be removed before continuing. (See your local codes). If you are painting the surface with an oil-based paint, simply rough up your surface with 220-grit sandpaper, clean and paint away. If you are covering your finish with latex, you should scuff the finish with 220-grit sandpaper, clean it well and apply two coats of latex primer before applying your final coats of paint. If you are applying wallpaper, we suggest that you scuff up your oil finish, apply two coats of latex primer and allow it to dry for at least 3 days before papering.
