How do I clean rust from tank

[Reece]

Hi I have just purchased a second hand tank for a spare as you never know and it has a pin hole I need to get fixed but was wondering what's the best way to clean out rust.
It only seems to be surface rust and could I seal it tank kit but have heard that it sweats and can cause moisture.

[Cykik]

Get a load of wood screws (count them) dump them in the tank & shake like a cocktail. Count the screws when tipping them out!!

[Del]

Cheap vinegar Iv heard is a good way to remove surface rust from inside tanks

[Reece]

Has anyone used Metal Rescue bath before and what's their thoughts.

[gsxbarmy]

Has anyone used Metal Rescue bath before and what's their thoughts.

Not used that, but just seen this on Amazon - looks like a remover and sealant and is something like what was recommended on the old org (from memory)
https://www.amazon.co.uk/Rostio-Remover-Protection-Emulsion-Sealing/dp/B019U8CPL4/ref=sr_1_1/258-3746335-4480235?ie=UTF8&qid=1505143501&sr=8-1&keywords=petrol+tank+rust+remover

Also happened to find this article which makes interesting reading on how to do it
https://www.reddit.com/r/motorcycles/comments/2ka7io/advice_on_removing_rust_from_a_gas_tank/

[Irish in Oz]

I use phosphoric acid on my old restorations.