I'm currently fettling a phoebus 615, it was quite rusty. I cleaned a few parts, which is now mostly rust free, (preheater cup, cage) which was originally nickel plated i think, but there is very little nickel remained sadly. What would be the best way to protect it from further rusting? Also i'm not quite sure what to do with the tank which is also quite rusty. I cleaned the other parts with citric acid + washing soda, but i'm afraid, that it would hurt the original phoebus sticker. What would be the best way to clean it, and protect it from the rust?
