Obliterine

Obliterine was an Australian and UK brand of mimeograph correction fluid, more commonly called corflu.

from Fancyclopedia 2 ca. 1959
(Auslans:Ackerman) Now better known within fandom as corflu, but definitely obsolete.

A solution of wax in ether, used to correct errors in mimeograph stencil cutting. (The word was originally the trade name of an Australian brand of correction fluid.) When a mistake has been made on the mimeo stencil, the openings in the wax are closed by rubbing, as with a paper clip, and obliterine used to seal the spot, which can be retyped after a few seconds. (It doesn't work quite so well on artwork.) The bad thing about obliterine is its habit of vaporizing and thickening in the bottle, cap it quickly as you will.

_
Obliterine, obliterine,
Without you where would we have been?
To err is human, and slannish too,
But we can correct our mistakes with u
Few of man's blessings are less unmixed…
— jfs

If, once the error's fixed
The meld is good, the fresh cut clean
Where typer slices Obliterine…
— lhs

from Fancyclopedia 1 ca. 1944
(Australian:Ackerman) - Correction fluid. It is stuff something like nail polish (np has been used as a substitute). When a mistake is made on the mimeo stencil, the openings in the wax are closed by rubbing, as with a paper clip, and the obliterine used to seal the spot, which can be retyped after a few seconds. The bad thing about obliterine is its habit of vaporizing and thickening in the bottle, cap it quickly as you will.

The stenciler has just composed a Poem in Praise of Correction Fluid., and you're going to have to listen to it:

Obliterine, obliterine,
Without you where would we have been?
To err is human and slannish too,
But we can correct our mistakes with u.
Few of man's blessings are less unmixed

(Here the pome breaks off, due to inability to find an appropriate rime for unmixed.)