How to use sprayable toxic gas?

Game Talk The Bunker
1

How to use sprayable toxic gas? It says it needs a chemical thrower. But I can’t find or make a chemical thrower. I am trying to fight triffids.

2

This is what you want. Here is the ammo. This is the magazine the thrower will need to use.

3

Crafting the chemical thrower requires the launcher skill.
But there is no crafting recipes to train that skill: http://cdda-trunk.chezzo.com/skills/launcher/1

4

Other then practicing with a launcher you find yourself, you could read a few books: This magazine may be easy to find. Also: All ranged skill books.

5

You can train launchers with a spraycan flamethrower, incidentally. Combined with a beartrap it makes a decent way to kill juggernauts.