Tank cleaning

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So the tank I am using is really a mess inside, walls feel gravely and glazing from old gas
Is there a good cleaner, or do I have to roll chains and rocks around in it like the old days. Do you like apple cider vinegar, “the works”, or go for the big bucks, metal rescue
Will be sealing it after
Tanks

[Pinion]

My $10 kit
4hrs, start to finish
Depending on your amount of rust and glazing
Me, not so bad
4 parts “The Works”, no water
Seal up all exits except for top. Pour in materials, swish around, let set. Move it to different resting point every 1/2 hr (again, mine not so bad)
If you have really bad rust, 8 containers of the works, then fill to top with water, let set 24hrs, like really fill it
When done, baking soda bath to neutralize, get as much water out as possible, acetone bath, if your going to let set mix in miracle oil with acetone so it won’t flash rust
I’m sealing mine right away

AC7DBF87-437D-4D92-AD47-C6F2FCA828EA by D charles, on Flickr

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Before and after

E9D89264-202F-4D53-8E62-99C5873716C1 by D charles, on Flickr

AD9A66C2-D234-4B44-A300-6A9B48EBA0DE by D charles, on Flickr

CCD5E10B-BBD9-4D4A-AF64-AE3C39762012 by D charles, on Flickr

C1250811-8E3F-42B9-9D57-E693DD79AB9C by D charles, on Flickr