Milkstone Remover used by dairy farms worldwide. Bathroom cleaners use phosphoric acid in ingredients but in lower quantity and you pay a lot for small bottle. Great for taking off rust and corrosion by hand (especially rims and spokes) with a stainless steel scrubby or Green 3M scrubber. Also use for gas tanks to clean out rust. And you can impress your partner when you clean the toilet and shower !
Poor mans Ultrasonic Bath - fill up a bucket with cleaner. Put your item in bucket. Fire up air compressor with hand held air blower attachment and start making some bubbles.
Here is link to UK supplier but am sure any dairy would let you have some and then you can get a tour of a modern dairy and see some amazing technology.
Kersia are leaders in providing equipment and support for chemical cleaning and hygiene technology across multiple sectors.
www.kilcoint.com
Removes milkstone from bulk tanks, pipeline cleaners, pipeline, milking machines, utensils, and other dairy equipment. Contains phosphoric acid with non-foaming wetting agents for fast penetration of milkstone and hard water deposits. Easy on metals and glassware.