When to Prime
Every unfinished surface—including wood, drywall, metal, and concrete—should be primed before painting. While it can be tempting to skip this step, the results are almost always disappointing. Paint applied to unprimed surfaces tends to peel, crack, and chalk more than paint applied to properly primed surfaces.
Previously painted surfaces may not require priming unless you’re switching between oil-based or latex paint, or the existing paint is failing. Always scrape and sand any deteriorating surfaces before applying primer. Remember, your paint job is no better than the preparation that goes into it.
While it used to be necessary to apply oil-based primers over oil-based paint and latex primers over latex paints, many primers today allow you to switch between them as long as you prepare the surface properly. When painting over interior oil-based woodwork with latex, be sure to sand or degloss the surface first, then paint with a bonding primer before topcoating with latex.Painting over multiple layers of oil-based paint on the outside of older homes with latex paint can cause adhesion problems, so in that situation, you’re better to continue using oil-based house paint.At first glance applying primer may seem like an unnecessary expense, but it actually saves money as well as time. A good coat of primer improves paint’s hide, or ability to cover, reducing the number of coats that are necessary to achieve a smooth finish. Primers can be tinted to match the paint color. Tinting improves the primer’s hide and smoothes the transition between primer and topcoat.To know more visit our site
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