General Discussion

If it had been done correctly, even someone cutting it (which I don't believe) would cause it to spall in chunk.
I actually think it had time to cure, though.
The chemistry suggests 90% curing in about 4 hours; 99% plus in 24 hours.
The kinetic rate is fairly high for an in situ reaction with no mixing to enhance mass transfer.
My guess is that it would be 5-10% cured by the time an area is fully coated by roller.
I know a guy that had that done on his garage floor. They told him to wait 6 hours before parking in there.
That's consistent with what I can estimate as a kinetic rate.
I think it more likely that the surface prep was botched by The Failure's buddy.