Sorry, I promised to write about the back edge on my tulwar, but did not – here it comes. The back edge on one of my tulwars is 15 cm – roughly 6”.
I agree that the blade is in a bad shape, but ‘endless’ hours of hard handwork will pay off – and soon be forgotten

. The ‘before and after’ picture shows that it can be done, but I agree that you have a ‘blade’ in much worse shape to work on than I had. Good luck.