It depends. Blow torches are odorless unless the canister is leaking. Flare guns don't smell like anything unless they've been recently discharged, and even then it's probably not a strong odor.
Fun fact, that torch wouldn't smell like fuel. Reason being is fuel is an accelerant, traditionally those torches have pitch, fat or some other long burning substance. Those don't smell like fuel other than the VERY small amount of accelerant to get them initially lit.
Anything is fuel if you try hard enough. I melted down an aluminum boat in a bonfire last fall. But pitch, fat and aluminum while burnable/melt able do not smell like "fuel" as the average person would associate them.
Fun fact fat was used in early soaps made to smell "good".
Ps. This isn't arguing with you, it's having a conversation.