Painting a finished concrete floor.

Mike R. asked 4 years ago

I purchased my house 26 years ago. Part of the basement was unfinished when I moved it, but the concrete floor was painted. I noticed that the paint did not last long, so I have repainted it several times. I am thinking of painting it again. I looked into epoxy paint, but they are for unfinished concrete floors and my is finished. Do I need to wire brush the floor so that the paint will adhere better? Would putting a primer down have any value?
Thanks.

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