In message , raden
writes
Scale remover (available all over the place) is the correct tool for
the job. Why anyone would want to **** about pouring diet coke around a
bath is beyond me.

Hmm, don't know how the % of active chemicals compares in the two but:

Tesco value cola 9.5p/litre
Viakal (limescale remover) £5.36/litre

that's knocking on 60x as expensive vol for vol, maybe I'll give the
cola a go.

--
bof at bof dot me dot uk