Concrete Acid Staining part deux

I went to the grocery store expecting to get the riot act from the sub about doing the work of his crew but nothing came through so by the time I got home they had put the acid down on the floor and it was working its magic.  

This sits on the floor for 24 hours and then they come back and neutralize the acid with a mixture of baking soda and water.  That gets all vacuumed up and the floor dries for 24 hours before they put the sealer on it.  2 coats of sealer are applied and then the floor gets covered up to protect it further from what construction is is still going on.  Floor is completely uncovered when you want but at least 2 days after final coat of sealer is applied.

This is right before the floor was covered up.  Looks like Monday we meet with finishing trim guys and get that part started.