HHO test5 - Removing iron from surface

May be a cheap alternative to a product called CitriSurf... thanks to the guy who mentioned this to me, you know who you are :) Recipe: 1 part citric acid powder, 10 parts water. Equates in this video to 1.5l water and 150 grams of citric acid. Bring to 70-80°C (160-180°F), let it stay hot for 45 minutes (longer won't harm), then turn off the power and let it cool down in there. Then wash off, use as if it were new :)






