How dangerous would hydrogen lifting gas with magesium alloy skeleton airship be?

Now we all know hydrogen is very dangerous IF lit and we all know once magnesium starts to burn there is no quick or easy way to extinguish it. The point is that magnesium alloys when coated with organic paint are very resistant to corrosion and flame and that you need an actual spark to ignite the hydrogen which is fairly avoidable in a sealed envelope. Do you think there might me a piezoelectric effect when force is applied to the skeleton, because as far as I can see this might be the only problem to such an airship?