AN EASY WAY TO REMOVE CHROME FINISHES ON ZORKI AND FED CAMERAS- MAY ALSO WORK WITH  OTHER CAMERAS (posted March 2007) Removing tarnished or tired Chrome finishes on FED-1 and Zorki-1 is quite easy and simple to do. However, dangerous chemicals are involved. Note:**This procedure calls for handling of sodium hydroxide and sulphuric acid solutions. [...]