Alright. After dyeing/antiquing, buffing the snot out of it, and sealing/finishing with the saddle lacquer, I applied a liberal coat of natural beeswax to the main body (SnoSeal brand product). This I applied cold, heated very slightly with a heat gun, then buffed liberally. Water beads right up and rolls off of it.
I treated the straps with a little less finesse. I applied raw beeswax to both the flesh side (which can be difficult to seal after being dyed) and the hair side. Then I burnished the bajeezers out of it with a baby food jar. Next, I wipe the tar out of it with a rag with just a touch of water on it to help smooth the wax. I repeat this process several times until there's a nice sheen and the grain on both sides is sufficiently sealed. I treat the strap as such because it will come into direct contact with clothing more often. It's a trick a saddle maker showed me.
Here's a picture of my boy contributing a little elbow grease to the dye buffing process:
I also added a waxed, but un-dyed piece of leather to the strap to 1)help distribute the pressure of the strap over a wider area on the shoulder, 2) to ensure there is no rub-off on the shoulder as the quiver slides around.
The strap is adjustable via a brass buckle. The buckle is attached without stitching by doubling the strap back through itself. Also, the tag end of the upper strap is kept in place by feeding it through two holes in the lower strap:
I also added a small strip of wood to the inside of the quiver just below the top cuff in order to prevent this area from bending and folding on the arrows, which is it prone to doing as the leather breaks in: