G’day; I’d like to add my 2c worth to the previous comments on
soldering hollow bodies. One does of course , make a tiny hole
in an unobtrusive spot, with the smallest drill available. If
you can’t get a really small drill (1mm or less) make one from a
needle. (write me off line and I’ll show you how). However, now
comes the tricky bit; you have soldered the job and put it in
pickle to remove scale. But it is almost impossible to keep the
pickle from getting into the hole, though you could block it
temporarily with children’s modelling clay. If some pickle does
get in, the only way to remove it is to first wash it out, by
gently heating the job, immersing it in clean cold water and
repeating until no pickle remains. Then you have to dry it out.
I recommend heating it until a wisp of steam emerges from the
hole, then placing the job in an airtight jar containing silica
gel drying agent. It might take a few days, but it WILL dry out.
Of course if you could evacuate the dryer container, the drying
would take place much faster.
/\ / / / / Johnb@ts.co.nz / /__|\ (_______) In sunny Mapua NZ