Black stain spreading on keris during vinegar cleaning

[Marcokeris]

Originally Posted by apolaki

Hi Marco,

I don't access to acid citric. Where can you get that?

Also, can I use concentrated lemon juice and water? If so, what is the recommended ratio?

Hi Apolaki
I have always easily found citric acid in the pharmacy (here in Italy). Citric acid resembles as white sugar and I used this acid only with blades where the rust was very difficult to take away as old rust inside the deep of the blade's structures. When you will have the citric acid you must put some spoons of this dust into water and you must put all the blade inside this water for one day or more or less (it depends how many acid you put in the water) and , for exemple, every hour, you have to see the the blades to control the process.
Western lemon juice, in my experience, works well together bicarbonate-soda if I want to take away old warangan from the blade ...and to clean the blade before to put a new warangan