Aauuuhhhh, I’m really not good on camera, even less so on mic. I’m worse at public speaking than Biden, and that's what youtube is. Plus I look & sounds younger than I am, which typically leads to being underestimated. So I stick to the written how-tos.
I like the technique I used here. Seldom do I get to use it on such a large prominent area. I did screw up but you wouldn’t know. There are three colors, but the the 3rd was over applied. Anyway, it’s simple. Use a rattle can but hold it about 16 inches away. If it’s a breezy day, aim down wind and let it be your sidekick. Don’t hold the tip down as you would for continuous coverage. Just tap it down and release. You want just an airborne mist hitting the car. Half dry but still sticky. It takes a little longer but nothing you need to pack a lunch for. That’s how to achieve that bubbled rust texture.
I gave the outside an acrylic wash after, and the center floor of the inside.