Question

What causes steel rubbing on wood to leave grey or black marks?

Answer 1

i do believe it is rust bc rust on steel is black

hope this helped mark me brainliest

Answer 2

Answer:

: Black spots are caused by water that has penetrated the finish completely and entered the wood.

• If this does not remove the ink, lightly rub the stained area, along the grain of the wood, with No.

• 0000 steel wool moistened with mineral spirits.

• Then wipe the surface clean and wax and polish it.