Now i knew i had to clean up my casting, and that raised another problem. So called ‘safety’ pickle, this stuff is nasty. it is corrosive and should be dealt with by a chemical treatment plant. Not poured down the drain!
I have followed the work of ute decker for a few years now, and was lucky enough to attend one of her seminars in London.
Her website is full of information about running a greener business, i downloaded the recipe for citric acid pickle from here, bought myself a slowcooker and some citric acid and was good to go.