I really don't get what's so difficult - in Malaga, we are told to wear a mask at all times when outside, and you NEVER see anyone not wearing one - in shops, walking the dog, outside schools, public transport (in fact you're not allowed on buses and trains if you're not wearing one), workers in shops, restaurants and bars, literally everywhere. We don't appear to go in for the chin warming variant either - always worn properly.
I suppose on the spot fines by Guardia Civil carrrying guns might help focus the mind somewhat