Quick shout out to Chris aka Father & Son Traditional Sharpening.

[Father & Son Traditional Sharpening]

You guys talking about this kind ?

That would be the one I believe, though it's possible Andy and I got our wires crossed. That is what I was thinking of anyways.

 

[Andy the Aussie]

Yes those. You can get a version that are sold as small cubes (maybe 2-3x the size of a dice) in a pack of ten. I use those but they are the same thing. I leave a couple of those cubes in my pack if I need to clean up in the bush at all. No need for soap etc, just water.

 

[elof_alv]

For sap you can use pertol or turps & a rag