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Right, a question for the masses...

I note in various respected texts that it mentions, when looking to restore or rebuild a S3, temporarily filling the main frame tube with a rust inhibitor to treat any existing rust and avoid further corrosion. However, it makes no mention of what may be appropriate to use. All well and good, but considering the volume of the frame tube, that's a heck of a lot of something to pour in!

Anyone got any ideas of what can be bought in suitable volume that doesn't cost the earth? I was about to add for a 'one off use', however, I guess that it can then be drained and stored to reuse in the future.

Perhaps a diesel and heavier oil combo could be used.

Any thoughts?

Not attempted this before, however id use a two step process

Step 1 remove any corrosion using this. This stuff doesn't convert rust, but dissolves it to just clean bare metal
https://www.frost.co.uk/frost-safe-rust ... xic-acids/

Step 2 to prevent any future corrosion use ankor wax to coat the inside
Ive a gallon can of the stuff around here you can use.

Any good for inside of petrol tanks Andy?

Ive used this last time i did a petrol tank went well

Wow everything seems much more expensive since last time i looked

https://www.frost.co.uk/fuel-tank-repair/

ive used Oxalic acid to clean the rust out of tanks before.
https://trade-chem.co.uk/product/oxalic ... antity=1kg

[quote="Adam_Winstone"]Right, a question for the masses...

I note in various respected texts that it mentions, when looking to restore or rebuild a S3, temporarily filling the main frame tube with a rust inhibitor to treat any existing rust and avoid further corrosion. However, it makes no mention of what may be appropriate to use. All well and good, but considering the volume of the frame tube, that's a heck of a lot of something to pour in!

Anyone got any ideas of what can be bought in suitable volume that doesn't cost the earth? I was about to add for a 'one off use', however, I guess that it can then be drained and stored to reuse in the future.
Sorry to jump on your query.
Perhaps a diesel and heavier oil combo could be used.
Any thoughts?[/quot out of interest what is the volume of a frame Tube , in litres Thanks in advance