Thanks for all the good info, Jt. These will be made of cedar and used outside. The goal is to produce these as quickly as possible, so to that end, I'm only planning to give them a single coat, which would have to be the color coat. Two years' usability is the goal, and anything extra is a bonus.
The snowflake picture is from the site I bought the plans from so I'm not entirely sure what colorant was used.
I've built some jigs now and feel like I have a sense of how I can approach the coloring/coating process. These will be made out of 5/8" thick planed (to conserve paint) cedar fence pickets. First, each side of the picket will be painted. Then all the parts will be cut. Afterward, the pieces will be placed into jigs to hold them for the final edge painting. I discovered there's too many issues with the dipping process I was hoping for, including the lines and fingerprints you mention.
I think I was leaning toward stain at first because I wanted strong part adhesion via wood glue, but now that I'm leaning more toward paint, I'm wondering how effective wood glue is at holding painted pieces together. I haven't delved into a project quite like this before.
Various colors... I'll advertise a main version close to the colors used in the picture, but I'm also planning to offer custom colors if someone wants to pay for customization.
Thanks for the warning about repetitious work. I'm sort of built for this kind of repetition. I'm not sure why, but I can do work like this for hours on end and not be too burned out. Nonetheless, I'm sure by the time it's done I'll need a long breather.
And yes, I've got two angle-specific chop saw fences made for cutting the 45 and 50-degree angles this project entails. Nice 80 tooth blade too.
The only question I have left is...what kind of paint should be used, or avoided?