[GreenKeys] TTY Hints from Heloise

[John Nagle]

> From: Jim Haynes<jhhaynes at earthlink.net>
>
> I'm using Evapo-Rust on a badly-rusted Model 15 bottom plate.  The machine
> was formerly a mouse house.
>
> I didn't have any vessel big enough to contain the plate for application
> of the solution.  Then I discovered that aluminum foil can be found in
> 18-inch width.  So - just roll out a sheet of foil and turn up the edges
> to make a pan.

     Disposable aluminum roasting pans are available in a wide range of
sizes. They're just heavy aluminum foil, but pre-formed in a press
which puts in reinforcement ridges.  I've used those for de-greasing
and de-rusting.

     With Evapo-Rust, metal that isn't submerged but is wetted with
the stuff will get rustier.   At the air/liquid interface, it
induces rust.  So you tend to need a lot of the stuff.  I
had to go to two AutoZone outlets to buy enough quart bottles.

     Another useful option is to put the item in a big plastic
bag, and block the bag so that it just fits the object.

     Incidentally, the mounting bolts for a Teletype Model 15
bottom plate are 3/8" diameter, 28 TPI, 1 1/2" long.  That's not a
standard bolt size, but you can get the threading die for that thread
("https://www.holesawsunlimited.com/product.php?productid=19862" is
one source; you may be able to find a better price) and cut one from
a longer bolt.


					John Nagle