Translations for rust in French

Here are paragraphs from public domain books translated:

"There are some spots of rust upon it. Shall I tell you how they came there?"	— Il y a dessus des taches de rouille. Est-il besoin de vous en expliquer la provenance ?
The Extraordinary Adventures of Arsene Lupin, Gentleman Burglar, by Maurice Leblanc	Arsène Lupin gentleman-cambrioleur, de Maurice Leblanc