A friend of mine had this frame and the seat stays rusted off of it. My solution was to join them at the seat tube. The frame is trash, but if I can save it fine, and I don't have to put a lot of work into it. as long as it's functional.
You can see here what I had to work with.
I filed of what was left of the seatstays.
Then I cut off the rusted part of the seatstays
The tubes mitered and they are covered in flux ready to be brazed.
The after brazing and filing, now I have to sand them up a bit.
A little primer and later a little paint and we are ready to go.