What skill does using a Molotov cocktail fall under?

I think it would be safe to say that some form of craftsmanship skill roll is required for Molotov cocktails to be made.

But, I’m not sure what it would be a roll call for, skill-wise, to use the Molotov – such as weapons, guns (as projectile weapon bows do also fall in this), or even athletics because it’s being thrown.

Is there a rule clarification I’ve missed which could clear up which is to be rolled? Or is it GM discretion?