Restoring Challenge Paper Cutter

Hey there, I purchased an old Challenge Paper cutter about a week ago, and I am attempting to restore it to its earlier glory. Lots of rust and dirt on this guy. I had a mechanic friend that told me to use muriatic acid on the rust. Which got off a lot of the rust, But whenever I put a clean towel to it, it seems rust is still rubbing off. I really want to get this guy in best condition possible, so I am looking for recommendations on how to get ALL the rust off. Also I have never used one of these before, and I cant find a Manual anywhere…I’d like to take it apart to make sure everything is completely clean, but its tricky when I don’t really know what everything does. I’d also like to figure out if there is a safety on this, so I dont chop off my hand, or any digits…Any help would be appreciated. I have attached some pictures.. Thanks in advance! Challenge: Size: 230 Model HL Serial # 11127

image: photo.JPG


image: photo(2).JPG


image: photo(3).JPG


image: photo(4).JPG


image: photo(5).JPG


Log in to reply   3 replies so far

The Challenge website has a page with their suggestions for cleaning rust off. After much research I substituted Mobil Dte 24 Hydraulic Oil for the SAE 10-weight motor oil that I could not find. Other people might have other suggestions for what to use.
Good Luck,

I avoid all rust removing chemistry.
Some residues, left behind on the surface
or that have managed to seep into gaps,
will cause, rather than remove rust.

A fine wire wheel on a fixed motor works well for parts
that don’t weigh too much to hold them up
to the spinning wheel.
For the bed, frame, and other heavier bits,
a fine wire wheel in the chuck of a drill does the job.
Pitted surfaces will usually require
a heavier gauge wire wheel.

I rub a hard, carnuba-containing paste wax into all
unpainted surfaces after rust removal.
This should be repeated regularly
because the wax wears away.

Roller gauges and other measuring instruments
will avoid corrosion if kept in a box
made of camphor wood or a wooden box
treated with spirits of camphor.
Steer clear of more acidic woods like oak or chestnut.
Woods that have been bleached will also
encourage oxidation.

Kansas City

What about electrolytic rust removal? Some have had success with that approach.