There is material relating to Fine Art in:
Artists' invitations. These are catalogued in the Johnson online catalogue. To browse these records, use Browse, set scrollbar to shelfmarks and type Artists
Prospectuses of prints: Prospectuses 43 (1750-1826) and 44 (1826--) Not catalogued.
Exhibition ephemera: Exhibitions 1 (18th century only catalogued)
Exhibition catalogues 1-17. These are catalogued (at a minimal level). To browse these records, use Browse, set scrollbar to shelfmarks and type Exhibition catalogues. Please note that the majority of the Bodleian's exhibition catalogues can be found on SOLO
Trade cards for artists (few). Trade Cards 1 (Art galleries and artists), Trade Cards 2 (Artists' materials and colourmen). To browse the records, use Browse, set scrollbar to shelfmarks and type Trade Cards 1 (or 2).