Quote:
Originally Posted by enzo1
??? Why do you have to acid wash after grinding?...
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I'm not sure why I have to acid wash but that's what the manufacture recommended. I don't think it will be too much extra work and I will feel better - especially since the grinding did not get every single spot. You will notice in my photos that there are some dark patches....this is where the concrete dips a tiny bit and so the blade on the grinder just scrapped the surface but did not grind off much. I feel that the acid wash will take care of any missed spots as well as the edges and corners that were handed sanded. I also have to fill some minor spalling and the fill material recommends acid washing first.