G'day all, One thing I can't stand is bad enamel on hoods. It doesn't matter what brand, if the hoods are no good, I don't display them. I generally don't bother to fettle the lamp or lantern. This hood was just such a hood that I didn't like. It has enamel missing and the remaining enamel was dull. I thought if I could remove the enamel I could nickel the hood. Sure, it won't be original but it would look much better - to me at least. Besides, if I nickel the hood, any future owner can always re-enamel it if they so wished. In other words, I'm not doing anything that can't be undone. Knowing how difficult it is to remove enamel, I put the hood in full strength vinegar to see what would happen. From a previous experience, when I forgot to remove a hood from vinegar and left it in overnight, the enamel went dull and had a whiteish film over it - from memory. Certainly, the hood went dull. I checked the hood after two days and it was dull but the vinegar didn't do much else to the enamel. I put the hood back and checked it a week later and the hood was still dull with no other effects on the enamel. I just checked the hood, 8 days after checking it last, and I got one hell of a surprise. The enamel on the hood was bright and shiny. The rust spots from the missing enamel have been blackened as the vinegar has killed the rust. I don't get it. All I can think of is that initially, the vinegar is attacking oxidisation of the enamel and that dulls the enamel. Once the vinegar has finished killing off that oxidisation the enamel returns to its original bright and shiny look? I really don't have a clue, perhaps someone may know what the dickens happened.