The New Zealand Railways Magazine, Volume 9, Issue 6 (September 1, 1934)
To Clean Mirrors and Picture Glass
To Clean Mirrors and Picture Glass.
Dust well. Polish with soft duster on which a little methylated spirit has been sprinkled. Finish with a leather or tissue paper. It is a good idea to clean the mirrors, etc., periodically with a paste of whiting moistened with methylated spirits, or with Bon Ami. When dry, polish with a clean duster. Do not allow the paste to touch the frame as it is difficult to remove.