Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Its hard to tell re; the corrosion , if it were mine I would use my Dremel & a brass wire wheel (always with safety glasses) & get down to the bare brass & see what you have, if the brass is sound you can just leave it be especially if its hidden, if its porous...then your going to have to tend to it by a strong but high temp soft solder , if you try to sliver braze it, it'll probably blow a rather nice hole in it as thin as those boilers are.