Derust petrol tank - paraffin?

[Ingah]

Am going to be derusting my CB500 fuel tank (steel), and am following a magazine article that tells me to use degreaser.

As far as i'm aware, i could use the paraffin i have. Is there any reason i shouldn't, as far as i'm aware it's a good degreaser?
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-- Ingah

[ZRX61]

Degreaser isn't going to remove rust...
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They're not one night stands, they're auditions.

[Ingah]

Article is in issue 5 of Practical Sportsbike Magazine (26 Jan - 15 March 2011).

By the looks of it - start with degreaser and water in 50/50 mix, add fish tank gravel to it, shake tank for ages, drain, repeat, dry, then use Jenolite.
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-- Ingah

[MarJay]

No, use Marine Clean and then metal ready, then rinse with water. Then seal with POR15 if there are holes in the tank. If you can get it to work! I've never had that much luck with the POR15 itself, but the Marine Clean and Metal Ready work just fine.

The Metal Ready leaves an oxide residue on the tank so it needs rinsing with water and careful drying afterwards. Then once dry it needs to be filled with petrol so it doesn't rust again.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[temeluchus]

Paraffin won't do anything to rust but it is good for getting water out of nooks and crannies as the two are miscible.
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Some shite cruiser. Now with guns and FREEDOM!

[ZRX61]

[kestrel]

Phosphoric acid is by far the best chemical for quickly and easily removing rust from the inside of a fuel tank. You can buy it from most industrial cleaning suppliers, try to get 40% by volume. You can also get it on Ebay.
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Isle of Man.........Road Racing Capital Of The World

[MarJay]

[Ingah]

[kestrel]

[ZRX61]

If you're not in a hurry, mix up some molasses, fill the tank & then walk away for 3 weeks..
____________________
They're not one night stands, they're auditions.

[Ingah]

So guys, out of these 2, which of these is likely to be a batter idea:
POR-15 https://www.ebay.co.uk/itm/POR15-Motorcycle-Fuel-Tank-Repair-Kit-BRAND-NEW-/280693090520?pt=UK_Body_Shop_Supplies_Paint&hash=item415a9ca8d8

or

Paraffin as a degreaser followed by
40% phosphoric acid https://www.ebay.co.uk/itm/5L-40-Phosphoric-Acid-Strongest-Rust-Remover-Descaler-/230526924024?pt=UK_HomeGarden_CLV_Cleaning_CA&hash=item35ac79b4f8
(Used diluted to some extent, i suspect)

Thanks for all the help so far, it seems this there is no one "right" technique for this, but plenty of wrong ones!
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-- Ingah

[Blaidd_Drwg]

I just successfully de-rusted my tank. First I used gravel/water to remove the large flakes of rust. Then I used oxalic acid to get rid of the rest. Then I propped it up against a radiator to dry.

Oxalic is similar to phosphoric in that it will eat your rust without eating your tank and it leaves behind a protective coating when it's done. You can buy a 500g packet on ebay for about £3.50 including postage. Mix it with warm water in a bucket, pour it in your tank, top up with more warm water and leave it to sit for a few hours.

I had a look at that POR15 stuff, decided it was too expensive for what it was.

[Ingah]

How many £3.50 500g bags do i need? (18L steel tank)

This stuff sounds like it's in my price range
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-- Ingah