Shooting shiny things is *hard*. Ideally, I could have been using tracing paper rather than studio rolls for my double diffusion material as I had to pump a lot of watt-seconds through there to get the effect I needed. Oddly, I think it looks best when the left and right side highlights aren't exactly symmetrical, hence the RHS softbox being an extra foot away.
The above shot took me about a day to get really right. That involved reading some articles, watching some videos, doing a *lot* of buggering about and re-jigging lighting. Once it was nearing done, I nipped round the corder to Tesco for some glycerin and a squirty bottle (top tip: a glycerin/water mix squirted on a glass bottle looks exactly like it's just come out of the fridge and is covered in beads of condensation).