I am looking to see what some of your differing techniques are for cleaning mud off of formations, particularly draperies. In the situation I am referring to, there are draperies on each side of a short hallway that are covered with the mud from muddy hands of the people passing through. I intend to clean this up and if it works, I'll proceed onto some other areas too.
Obviously there isn't a single cure-all as every cave and every formation is different. I'm just curious to know what has worked for you, in your situation. I'm talking only about mud in this instance. Maybe in the future we'll move on to other topics like spray-paint and other cleanup issues.
Here is where I am aiming to start my clean-up. I encourage you to post your own pictures as well.