Homebrew PCBs

The drain cleaning products that contain concentrated sulfuric acid work like magic on sinks stained with ferric chloride. Just put some on a damp sponge, wipe and rinse.

Baxter

--- In Homebrew_PCBs@yahoogroups.com, lists <Stuartlists@...> wrote:
>
> In article <4D40D94B.1080709@...>,
>    Philip Pemberton <ygroups@...> wrote:
> 
> > JohnsonDiversey "Titan Sanitiser" works a treat for getting rid of FeCl 
> > stains. Rinse the sink out to dampen it, turn off the tap and count to 
> > ten. Cover the inside of the sink in the stuff (it's a powder) and rub 
> > it on the stains. Rinse away the remaining powder (it's water soluble).
> 
> Proprietry "Ferric Chloride stain remeover" is based on Oxalic acid.
> 
> -- 
> Stuart Winsor
> 
> Midland RISC OS show - Sat July 9th 2011
>