Ah "chalking" has come back again. During the depression bums would "chalk" places where you could get something to eat. In the late 90's kids would "chalk" places where they could free load WiFi. Now "Q chalking" is where you can get information. Love it.
Home supply stores sell “Spray Chalk”.
Easier on the knees and back.
You could spray-chalk a ginormous ‘Q’ in the road in front of your house, pain free.
just sayin’