Yep - - Al I need to separate my Burroughs Xcelite tools somehow form some of the other things. Acetic acid will eat stuff... the Enigma had a green acitate filter in the lid... with the case closed it ate all the metal keytops rings up. It was ghastly! Ed# In a message dated 1/8/2017 9:10:45 P.M. US Mountain Standard Time, aek at bitsavers.org writes: Xcelite is notorious for this