wrote in message
ps.com...
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.

Actually, sometimes concrete becomes "polished" and smooth over time, and is
in the most need of etching. Fresh concrete rarely needs it.