Monocouche white dust on drive

[GARZX9R]

Just done my extension with ecorend, had tarps down which caught 99% of the shite and scrape, but after I done a final sweep up there's a white fine dust on drive and pavement, is it best to leave or is it best to hose away, just don't want a permanent stain

 

[bobski]

If near the finished work, I 'd wait until that's properly set first or protect it from splashing at least.

Sweep floor then hose, and see how it cleans.