Wow guys, thanks for the outpouring of advice and support!
So I've been very busy since my my last post. Let me get everyone caught up.
So I ground off all the rust and coated everything in navel jelly. Here's everything all cleaned up.
Some parts carnage.
Ash pan before...
Ash pan restore in progress...
I came up with an ingenious way to clean up the axle. I chucked it up in a drill, then clamped the drill in a vice. Turned on the drill and hit the axle first with a file to knock most of the rust off. Then various grits of sand paper, then steel wool.
Finally I coated it in gloss clear.
Here are some shots of the ash ring support cleaned up and coated in rust neutralizer.
Leg support tabs re-welded, they may not be pretty but they'll hold.