Got 80% done with rust-slowing a 17yo Toyota using Eastwood products.
Rust-convert, undercoat, primer, chassis black, inner-chassis spray tubes, exhaust paint.
Still needed to pull the wheels and dress up the smaller bits.

I like their rust converter. No smell or burn and leaves a shellac-like coating.
Shake very well and then shake some more. Spray it on a chip brush and really work it in.
This is a clothes drying pole I had to chisel and grind smooth because the dirt was like rock.