You're welcome, my pleasure.
I need to replace a rim on my disc brake 26in wheeled touring bike because of some splits near the spokes like in doug64 photos. I got some good disc only rims that were a good price, maybe 35 dollars Canadian, dt Swiss rims made for cargo bikes, and need to get someone to build them for me.

If you feel like it, get back here with what you do.
Regreasing the hubs is always a good thing to do.
My favorite softer brake pads are those salmon coloured kool-stop pads. They made a noticeable difference in better braking on my canti brake bike from the stock pads.
All rims will wear out over time, it's inevitable, but wet dirt roads are the worst conditions. I don't ride much in these conditions so I've never actually worn out a rim yet.
My winter bike probably gets the most gritty conditions riding, but I'm in snow and ice and not often on hills, not much hard braking and going slowly anyway.
Cheers