Mixing your own diamond paste offers cost-effectiveness and customization options, providing a high-quality abrasive solution for polishing and lapping projects. In this video, we explore the process of mixing diamond paste/solution for stropping, polishing, or lapping. The base mix consists of a 1:1 ratio of vegetable glycerine to dipropylene glycol, with added diamond powder in roughly a 3% ratio by weight.
For example, in a container holding 15 grams, 7.5 grams of each liquid and 0.5 grams of diamond dust are used.
Adding a bit of water makes the base oil mix thinner and sprayable, handy for applying the diamond solution to strops.
Alternatively, colloidal silica can be mixed in as a thickener to create a paste-like consistency, mimicking the diamond paste available for purchase online. Furthermore, the addition of food coloring allows for color-coding different grit sizes.

Original Recipe video:
https://youtu.be/BGm0IyjxbMY?si=k0jUNE-DZCiL0lpf

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0:00 Base Oil Mix
2:09 Sprayable Fluid
3:28 Thicker Paste
4:39 Uses and Inspiration
6:24 Leather Strop