Annesi Bindings | How to Print Images onto Book Edges @AnnesiBindings | Uploaded June 2024 | Updated October 2024, 2 hours ago.
This video demonstrates how to transfer images from an inkjet printer onto book edges, thus enabling one to use marbled or other designs on one's book edges.

The videos referred to are:

youtu.be/G5t2BWQZ11w for upgrading printed endpages using DIY Wax Paste
youtu.be/qo49nGKWCvI for trimming edges without a guillotine