Foxing
The Century Dictionary and Cyclopedia
noun.
An extra or ornamental surface of skin or leather over the upper of a shoe.
Wiktionary, Creative Commons Attribution/Share-Alike License
verb.
Present participle of
fox
.
noun.
The
discolouration
of
printed
material with brown
marks
Word Usage
"Nice fizzy sign too Mr. A with only minimal 'foxing' as the enamelists say (or would if they didn't use the more prosaic term rust)."
verb-stem
fox