Concrete grinding sufficient enough?

[ShakaLaka]

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Photos were taken after spraying down the garage with water due to concrete dust residue. I tried to take photos of partial dry / partial wet so you can see the difference.

I just finished two days of concrete grinding using a diamond wheel attachment. I've been attempting to remove the old 1980s oily red paint that was on the floor. In the photos, hopefully you can see the little bits of splotchs leftover, I'm wondering if this is enough to do a pour (after acid etching) or if I need to hand grind each individual splotch?

My main concern is reducing flaking over time.

 

[tncatadjuster]

Please show more after it is dry? Looking ok so far.

 

[ShakaLaka]

Please show more after it is dry?

Sure! This is my first project like this and wasn't sure if it mattered dry / wet.

 

[ShakaLaka]

Please show more after it is dry? Looking ok so far.

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[Shea]

I'm wondering if this is enough to do a pour (after acid etching) or if I need to hand grind each individual splotch?

You shouldn't acid etch after grinding. Grinding is performed if acid etching is not sufficient. Not the other way around.

 

[ShakaLaka]

You shouldn't acid etch after grinding. Grinding is performed if acid etching is not sufficient. Not the other way around.

Thank you. I was under the impression it was grind than acid etch but apparently it was the opposite. Now that my grind job is drying out, its looking better than I expected which is very exciting. Now I have to decide which floor to go with... struggle is real

 

[LegacyIndustrial]

Thank you. I was under the impression it was grind than acid etch but apparently it was the opposite. Now that my grind job is drying out, its looking better than I expected which is very exciting. Now I have to decide which floor to go with... struggle is real

Yes Shea is correct, you shouldn't etch after grinding. Dm me if you need help choosing what floor coating to get.

 

[3cargarage]

I etched after grinding but made sure to rinse forever and dry for days on end.

I was scared that the grit from grinder wasn't enough and wanted to be sure.

Worked really well.