I saw a miniature dustbin outside my superbuy cheapey shop this afternoon and as it is just galvanised steel, it might get you an easy solder 'Hull'??
I am sure you have a similar shop in town that stacks stacker boxes and bins etc outside and should therefore have a small bin.
You might be able to make an old fashioned soldering iron from a brass electric plug pin filed to shape and screwed via the convenient hole to an old BBQ implement handle or similar. Heat it with a blow lamp so keeping better control of your heat placement.
It might take some practice to use??