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Originally Posted by Michael G.
Sorry to doubt you, but is this really true??
If so, way is there since a difference in price using the same brand name??
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Paints are made with similar base components (i.e. film forming polymer, non-film forming polymer, resin, titanium dioxide, water and various additives for wetting, defoaming, cross-linking). The better polymers cost more, water costs less. The polymer system matters (acrylic, alkyd or epoxy). Additives that contribute to better rheology cost more. If you ever painted with a cheap paint, I bet you see the splatter on your arm. The more expensive paint does not do this. Understanding percent solids helps explain why some paints may be better. As for those that have better hiding, expect that formula to contain more titanium dioxide.
If I was painting today, I do not need the top of the line paint. I find a "B+" paint to do just fine. I also expect to paint 2 coats on any surface I work with. In my days working with Pratt & Lambert Paints I would have sworn by it. Today after being owned by Sherwin Williams for 20+ years I have no clue what they have done to this once great paint.
Lastly, when taping off, I paint my first coat along the tape line the same color as the trim. Therefore any bleed through matches the trim. I find there is always some bleed through.