I recently did a job for a friend of mine who designed his own invitations. Below are a few progress shots, but even more interesting is that I took some video of the printing process and the edge painting. I narrated it (somewhat awkwardly) with some voice overs after the fact which I hope will be helpful. No one in the letterpress industry seems to want to share the trade secrets, but I’m happy to pass it on. I’m sure many of those trade secrets include tips that work even better than my method, but nonetheless I hope it will help you!
You can find the videos of me printing and edge painting this job in this link: