Painting concrete

I am using Color Place concrete paint and the directions say to "etch" after applying paint to concrete. I am unfamiliar with this procedure. Can someone explain what this (etch) is?

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You could ask the expert where you bought the stuff from, but Walmart & The Dollar Store do not have paint experts.

Could've, would've, should've used a concrete stain. The concrete is etched b/4 staining.

Dollar to a donut, it's etched b/4 painting too.

You could ask the expert where you bought the stuff from, but Walmart & The Dollar Store do not have paint experts.

Could've, would've, should've used a concrete stain. The concrete is etched b/4 staining.

Dollar to a donut, it's etched b/4 painting too.

The only reason I could see "etch" written in directions after painting concrete is if you want areas not painted to have a different texture. For example if one were to paint say tile lines on a concrete, this would protect the surface painted and using an "etch" would remove a layer of the unpainted surface. We use this in many applications and in metal process with acid. Using a wax resist similiar to say a paint, this protects the metal area waxed and then an acid is applied and the area left unwaxed is "etched" I would guess that the etching needs to happen on the concrete before the surface is painted though..... This is a guess. And that a solution of muratic acid will etch the concrete to a certain amount depending on the strength of the solution.