Gonna bump this thread because I've been having some issues lately re-bluing an area on the upper of my Denix.
I repeated the same steps I did before when I first put the thing together (sand down finish, then buff with steel wool, lightly heat the surface, apply bluing) but now, rather than getting dark, it gets only as dark as say a tarnished steel. It's not exactly getting as blue as I'd hope.
Any help would surely be appreciated!