cover something with something
cover something in something

Three or four days of ground covered in less than an hour.

The eight miles were covered in less than two hours.

They had covered 160 miles in five days, he said.

He looked at his hand, which was covered in blood.

They are said to look around three or four years old and covered in red hair.

The front of her uniforn-1 was covered in black blood.

He had certainly covered a good bit of ground in the time.

He turned to me, and the right side of his face was covered in blood.

Covered in blood, he did not look like a human being.

Maybe he just wasn't used to being covered in blood.