Step 1: ensure artillery shell is defused
Step 2: apply ketchup
Step 3: massage ketchup across the entire surface of the artillery shell for uniform coverage
Step 4: heat lentil soup over medium heat for 10 minutes
Step 5: remove ketchup from artillery shell, rinse with water, polish
Fully vegan, takes 10 minutes
I should get a flare gun but don't have one. This is 17cm long and 4cm wide so I doubt it'd fit. All the internal components of the shell were removed by the artist engraving it so striking it wouldn't do anything mechanically.