cleaning rust from machine tools ?

[The_Yellow_Ardvark]

If there is rust under the paint, it will lift off back to sound paint.
I have found out a few times.

 

[peterw3035]

Thanks that's interesting, I'll have to give it a try.
Next question, how best to clean up the jappaning particularly in and around the fiddly bits?

 

[The_Yellow_Ardvark]

Thanks that's interesting, I'll have to give it a try.
Next question, how best to clean up the jappaning particularly in and around the fiddly bits?

Cotton buds dipped in wax.
Then dipped 600 grit powder.

 

[bushwhaker]

What you do with the slop that left after derusting?

 

[Fergie 307]

Thanks that's interesting, I'll have to give it a try.
Next question, how best to clean up the jappaning particularly in and around the fiddly bits?

A fibreglass scratch pen is really good for this sort of job.

 

[peterw3035]

Cotton buds dipped in wax.
Then dipped 600 grit powder.

Thanks, @The_Yellow_Ardvark grit powder is not something I know anything about but will give it a try.

 

[The_Yellow_Ardvark]

Thanks, @The_Yellow_Ardvark grit powder is not something I know anything about but will give it a try.

Valve grinding paste is also good.

 

[peterw3035]

A fibreglass scratch pen is really good for this sort of job.

Thanks, @Fergie 307 I had to go to Google as I've never heard of a scratch pen, as I'm now in the picture I've placed an order

 

[Fergie 307]

Thanks, @Fergie 307 I had to go to Google as I've never heard of a scratch pen, as I'm now in the picture I've placed an order

Glad to help. As you have probably found if you have Googled them, you can also get them in brass and stainless steel, really handy for those fiddly little corners.

 

[imageel]

I concur that fibreglass scratch pens are good for this but would add that you might want to exercise some caution when using them - fibreglass shards are incredibly irritating if they become embedded in your finger tips, and also the dust is pretty nasty too.
Particularly relevant for this type of work where you will likely be working pretty close to the object being cleaned...

 

[--Tom--]

Another option is molasses, diluted 1:9 with water and then just chuck the parts in and leave them for a week or two.
You can get molasses cheap at Agri suppliers.

Works through chelation so is gentler than acid, doesn’t need elec like electrolysis, just takes longer