Keep it real
28DL Full Member
No self respecting explorer should use spray paint, it lasts practically forever in the cool dark of underground places and is a pain in the neck for the people who have to clean it off. If a route back has to be marked you can just leave a few glow sticks or plastic pointers on the ground which can be collected up as you move back to the exit.
Was just joking lad i would never do this haha!