Q: In a recent remodel, I needed to repaint a single wall. The client still had a half-gallon of good-quality paint in a can that had been opened and then resealed. The paint inside was still good, but very thick. Is there anything that can be added to latex paint to make it flow more easily after it’s been open and stored?

A: Scott Burt, owner of Topcoat Finishes, a high-end residential paint company in Jericho, Vt., responds: When paint has been left behind from a previous paint job and properly stored, verify that it is the exact batch that was mixed initially, so the paint color and sheen will match the other walls as closely as possible.

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