SOHC.co.uk Forums > CB750

Rust removal from a painted tank ?

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Grewth:
Thanks for that.
I'll have a good look tomorrow when I have some time to myself

Laverda Dave:
DEOX-C, brilliant stuff. Pour it into the tank (it's powder), boil thf kettle and fill the tank to the brim. Wrap the tank up, leave it a couple of days (with some periodic shaking), undo the plug and be amazed at what comes out. I always dry mine with a hot air gun pushed into the filler cap. Once dry use diesel to stop it flash rusting.
You may have to do it a couple of times if the rust is bad.
DEOX-C is available direct from Bilt Hamber, about £18 with delivery.

Oddjob:
Thanks for the links George. Watched a couple of vids of it being done, one used soda crystals and one used stuff used in outdoor swimming pools, being in the UK we don’t have a lot of outdoor swimming pools so soda crystals it is. £2 from Tesco’s btw.

I did think something was in the water so it’s nice to see that confirmed.

Everything seems fairly straightforward, seems simple. A spray can lid seems to be a good idea to suspend the anode in. Cut a slot to clear the cap hinge hole if required.

I like this method, you can just leave it to do it’s work and it gets too all the nooks and crannies, cheap as well. I’d say use hot water initially as it would dissolve the crystals better.

Got a nice tank with some light to medium interior rust, gonna give this a go myself soon.

ozzybud:
I have a method I use that gives  great results.
I start with filling the entire tank with Evapo-Rust. It is available in Europe. Let it soak for a week. It won't harm paint or eat away at metal. Shake and drain thru a filter and save it for use again. Get 1/2 gallon of diesel and a pound or so of lightweight chain.shake the tank at all angles to scour the walls. Drain into a large pan. You will notice debris and remaining evaporust which is water based pool at the bottom. Pour the diesel back into the tank less the debris and water. Repeat until  walls are clean and diesel is coming out clean. The coating of diesel will prevent flash rusting until you fill it up.

McCabe-Thiele (Ted):
I used Evaporust on my 400 tank, in the UK it's become quite expensive, to fill the tank today would probably cost £60-70 on first filling.

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