I have seen on your lantern, the wrinkling on the top vent part. This seems to be a fault in the press die they used, because my lantern has the same wrinkling on the vent top.
Yes, mechanical polishing with polishing paste and felt pad. All mounted on a hand drill. last night, firing I've some flame around the generator. An idea of why ?
@Tony Press It's on the top, where the generator is inside of the vent tube. I think the burning was done inside the vent tube. I retry tonight