Frequently Asked Question Painting brick or stone How do I paint brick or stone Painting brick or stone: If the surface has never been painted, it is important to prime it using any latex topcoat that you select. Thin with water up to 1 cup per gallon mix, apply one coat. If the brick has been previously painted, prepare the surface by first using a wire brush to remove any loose paint. Unless the old coat of paint was peeling all over, a single coat of latex paint should be sufficient to refresh. Using the same paint not thinned as the second or final coat will finish the job.