This has been around for a while. They have found polished stones used by slingers with things like Catch or the literary equivalent like a one finger salute. Even today you sometimes come across bombs people have written or drawn stuff on (I have saved somewhere on my computer one that has Grumpy cat on it, and another bomb that said "This is for making me miss Season 3 of Game of Thrones."
How would the different races view this or implement this?
![Image](https://cdn.acidcow.com/pics/20130320/grumpy_cat_a_bomb_02.jpg)
![Image](https://worldwarwings.com/wp-content/uploads/2017/03/p-40-shark-mouth-logo-735x413.jpg)
As for Trench Art, this is art made by soldiers, prisoners of war, or civilians due to armed conflict or the consequences of it. War is said to be 90% boredom interrupted periodically by 10% of pure terror. There was a model ship made from spent shells from cannons that was on an episode of Pawn Stars, and my Mom gave one of my brothers a lamp from a shell just like that. Wikipedia has a small statue of a woman made from these casings as well as a par of goblets to name a few examples, but the artwork does not need to be made from scrap or discarded ammo (anything could work).
What would some good examples in this setting be of that?
![Image](https://d3h6k4kfl8m9p0.cloudfront.net/stories/Jl.Ap2eCevxV5QM8Egi.4A.jpg)