Everything from little kids chalking on hopscotch squares and spilling their bubble blowing soap mixture, to bikes and foot traffic.
And then there were those couple years of duck doo from the crapping quackers.
The walkway and porch started out getting a fresh coat of sealer seasonally - usually in the Spring - and in it's first years of life it looked wonderful, but 20 years later not so much.
From time to time the exposed aggregate also received an acid wash to clean things off, like rust stains from hard water dripping when the hose was left leaking.
But when repeated rough winters caused a long crack in the walkway and some sinking, it was time to give the walk an affordable fix that would revive it.