On Fri, 29 Aug 2014 07:16:08 -0700, RobertMacy
wrote:

On Thu, 28 Aug 2014 18:19:39 -0700, wrote:

...snip...

I still have some red chalk lines that have survived dozens of
pressure cleaning and 2 hurricanes. Red is pretty permanent.

They had to use that carcinogenic red food coloring somewhere!
Get som "barkeepers friend" - apply in a thick paste and cover to
keep it from drying out. Leave it for an hour or so and scrub with a
stiff bristle brush.

That said, a shotgun could prevent having to do it again. Shoot
anyone using red chalk. There is no excuse for using that crap when
blue works just as well and is a LOT easier to remove!!!