I remember having some Tonka trucks in the 80s-early 90s. They were made almost entirely from metal, like the cab on the dump truck. That was metal. I think the only plastic was the tires and front bumper. We used to take them to the beach to make sandcastles. Not even the salt could kill them. They were invincible even after the paint flaked off and the metal started to turn to rust. I got so many cuts from those trucks. But they still held up. I don't know what happened to them.

We had a dump truck, grader, and a digger.

They looked like this and similar patina:

https://www.vintageaddictions.com/listing/733987968/1980s-pressed-steel-mighty-tonka-diesel

https://www.etsy.com/listing/1015813103/tonka-1989-classic-yellow-grader-tonka

https://www.pinterest.fr/pin/271693789990767699/