unpainted

From Middle English unpeinted, on-poyntid, equivalent to un- +‎ painted.

unpainted (not comparable)

1. Not painted
   • 1900, Charles W. Chesnutt, “chapter I”, in The House Behind the Cedars:

     Perhaps the surface of the red brick, long unpainted, had scaled off a little more here and there.

   • 1960 February, “The first of London's new Piccadilly Line trains is delivered”, in Trains Illustrated, page 93:

     The new cars incorporate many features first introduced in the 1938 tube stock, but major changes include the use of rubber for the bogie bolster and axlebox suspension, fluorescent lighting, and the panelling of the cars in unpainted aluminium alloy.

• unpantied