One needs to be careful with hydrogen gas. Do a web search on the Hindenburg disaster.
You mean coating the flammable aluminum airframe with iron oxide and powdered aluminum paint otherwise known as thermite is a bad idea. Watch the video again the hydrogen fire is barely visible rising above the thermite fire of the skin and airframe. This has been known for more than 50 years now myth busters even recreated it in glorious detail on national TV. Again don’t let science ruin a good luddite hysteria. Nasa and the oil industry uses hydrogen every day with little issue.