The reason for this is simple. Primer will stick better to old paint than new paint does. Further than that, applying a quality primer will help to prevent the new paint from looking blotchy and will create a more even sheen.
You have likely heard throughout your life that oil-based paints cannot be mixed with other types of paint. At the same time, you may have been told that you can use latex paint on top of an oil-based primer. Both of these beliefs are true, which may at first sound confusing.
Primers are specially formulated paint products that are used to prepare surfaces for the finish coat of paint. Their most important job is to adhere to the substrate while creating a uniform surface that is ready to receive paint. Primers also act to seal pores in wood and other permeable materials as well as to prevent stains, knots, and wood tannins from bleeding through.
I went to give the ceiling a light sanding and the paint started peeling off in big sections. Was it bad that they used water based primer with Latex paint? It sounds like you did everything right with the priming and painting.
Painting is the nation's number-one home-improvement project. It can help you change the look of a room from dull to brand new. Here's an interior-painting primer, starting with the pros and cons of oil-based and water-based, or latex, paints.
Primer paint gives your finished paint job a smoother finish than if you did not use a primer at all because paint grips better and it will last much longer. Primers will, even though relatively expensive, save you a lot of money in the long run. What you use to prime depends on the surface that you are painting — wood, metal or concrete.
Many do-it-yourself homeowners associate the Kilz brand of paints and primers with ultra stain-blocking abilities, akin to a crack unit of paint-bearing SEALs you call upon to get the difficult job done. If you merely want to put color on a wall, you use regular acrylic-latex paint. But if you have a problem, you use Kilz or other brands of job-specific stain-blocking sealers and primers.
Primer is a must for any surface that will be paintedespecially wood. It can be thought of as a preparatory layer that will protect the wood and enhance the paint. Many people may feel like applying primer is unnecessary and annoying, but you are most likely going to be unhappy with the way your paint job looks without it. Just as using primer is importantso is choosing a good one.
You may now add items to your collection anywhere you see the Add icon. Learn more about the Project Box here. No matter how many coats of paint you apply, finished walls rarely look perfect if the surface hasn't been prepared with primer first.