Painting concrete crawlspace floor without etching first?
I think etching becomes less of a requirement for older concrete. The
purpose of etching is to give the concrete a rough surface so the paint
will stick. If the floor has become rough over the years from wear,
for example, then I wouldn't etch it.
But it does need to be clean of all oil, grease, dirt, etc. and have a
rough sandpaper like finish, not a polished smooth look.
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