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Fuel tank cleaning

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Waggles:
Have got round to cleaning out the tank on my F1 rebuild. Basically after removing around a bucketful of rusty, petrolly, smelly gunk the inside is not too bad, the usual expected rust along seams ( not enough to leak ) and small rust 'spots' over the sides.

Appreciate the gravel / handful of nuts techniques but that seems a little harsh for this and am not sure that will get at the seams. Anyone had any success with any prioprietory rust removers?

Tomb:
We've just done a tank at work with Phosphoric acid, it came out looking like fresh bare brand new shiny steel

Clicky

Waggles:
Cool, thanks, will give it a go

the-chauffeur:

If the acid route sounds a bit extreme and you've got time on your hands, I've had great results with this stuff. It dilutes 1-10 (one part solution, ten parts water) and you can get it in one litre bottles.

Ignore the instructions on the side in relation to how long it takes - it's best to leave the tank full for a week or so.  I dunno what's in it, but it's completely paint safe and passive.

Waggles:
Just to relate the story in case it helps others, am having a frustrating time with this tank ( particularly so as it is the only thing stopping me running the motor! ) I checked the garage and found some 'Metal ready' from Frosts which is basically Phosphoric acid, only had a litre so in it went with a few nuts. Agitated said tank periodically during the day and I could see the rust coming off, excellent. Unfortunately, left it too long so that part not under the liquid dried and deposited rusty coating everywhere!  >:(  ( Entirely my fault, instructions say to keep it wet ) Next day much scrubbing with bottle brush and cleaners got me back to where I was ( bottom of tank clean, sides not so ) had to go out, left tank overnight so it went rusty again! Ever heard of WD40 Waggles?!?!?! Got some of the Halfords stuff recommended above ( Hadnt read the post above at that time ) diluted it and chucked it in, left for 2 days, much better AND I remembered to spray the WD40! Still needs another scrub etc but am getting there! Oh and anyone know how to get nuts out of a fuel tank?  ;D

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