“Covered with” vs “covered in” vs “covered by”
From J.K. Rowling’s Harry Potter and the Philosopher’s Stone (June 1997):
He bent down and pulled his wand out of the troll’s nose. It was covered in what looked like lumpy grey glue. ‘Urgh — troll bogies.’
Or in its shamelessly bowdlerized version, Harry Potter and the Sorcerer’s Stone (October 1997), ‘translated’ from the original English for the American mass-market audience:
He bent down and pulled his wand out of the troll’s nose. It was covered in what looked like lumpy gray glue. “Urgh — troll boogers.”
From Colin Fine’s explanation, I can picture the troll’s boogers widespread over the wand, not hiding it. In the example, can “in” be replaced by “with” keeping the same meaning in the reply?