Trust me, you are probably better off just learning the skill with a character point than looking for a schematic. Actually I dont know that I ever found a schematic for this.
The schematics you can learn you cannot find or buy anywhere. The only ways to get Molotov cocktail is either by learning it yourself or having a follower who knows how to make it.
Well, it is easier than making homemade gunpowder, but then so is tossing a pound of sodium metal in a lake, but both of them can blow your head off. I'm a retired chemist & forensic toxicologist, BTW.
Ohh, finally someone to help me make a decent bomb! I have a couple of people whom I'd like to send some explosive presents
Chunk944, if you don't know how to get solid sodium metal, there is a very strong presumption that you and all your neighbors would not be safe if you got some. To get slightly back on topic, I've found it very irritating that you can't "find" the "learned" schematics, but what the heck - if everything about the game was easy it would be no fun.