I’m not familiar with the building, but it looks like it could be limestone, which is porous. That would make it difficult to remove something painted on without removing a decent amount of material from the surface. The paint is probably in there pretty good, and power washing may have pushed it deeper.
Oh wow, they actually did. That’s a multimillion dollar artwork power washed off a wall.
And not very well, either.
I’m not familiar with the building, but it looks like it could be limestone, which is porous. That would make it difficult to remove something painted on without removing a decent amount of material from the surface. The paint is probably in there pretty good, and power washing may have pushed it deeper.
They hand washed it. The chemicals are probably just drying out.