SOHC.co.uk Forums > CB500/550
Removing dodgy liner from a pristine painted tank
AshimotoK0:
--- Quote from: Skoti on May 02, 2026, 09:02:34 AM ---
--- Quote from: AshimotoK0 on May 02, 2026, 08:54:07 AM ---
--- Quote from: Skoti on May 02, 2026, 08:46:41 AM ---
--- Quote from: McCabe-Thiele (Ted) on May 01, 2026, 11:45:30 PM ---The product description does not mention anything about being an Epoxy Remover aside from on the tin itself.
It just reads like a repair product to me unless I'm missing something.
--- End quote ---
Ted,
I agree, looks like the ebay seller has attached the wrong details to the item description.
--- End quote ---
See previous post back to Ted. Looks pretty clear to me, and probably the chemical I would choose if hydrolysis doesn't work.
(Attachment Link)
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Yes I agree it's sealant remover, but looks like the ebay seller has attached the wrong details to the item description.
Please see my previous edited post for the correct details.
--- End quote ---
I see what you mean now ... but the product being sold does look like remover. I think I would start with hydrolysis with Rob's tank though, just in case the metal is perforated as that remover will definitely trash any paintwork.
McCabe-Thiele (Ted):
A solvent that can remove Tank sealant especially Epoxy Resin based ones will almost certainly remove paint I would have thought.
My first thought was to clean out the tank to remove any loose sealant, then fit extra in line filter(s) to catch what passes throught the standard filter arrangement, not a fix but it means you can ride the bike.
AshimotoK0:
--- Quote from: McCabe-Thiele (Ted) on May 02, 2026, 10:27:54 AM ---A solvent that can remove Tank sealant especially Epoxy Resin based ones will almost certainly remove paint I would have thought.
My first thought was to clean out the tank to remove any loose sealant, then fit extra in line filter(s) to catch what passes throught the standard filter arrangement, not a fix but it means you can ride the bike.
--- End quote ---
Rob has bought my NOS K1 tank to use Ted and just wants to clean out his old tank to see if metal is intact .. then if not perforated, remove rust with a view to selling. His tank was the wrong gold for a K1 anyway.
AshimotoK0:
AI Overview
Yes, you can use electrolysis (often confused with hydrolysis) to break the bond between a failing tank liner and the steel, effectively removing it. Electrolysis works by using an electric current and an electrolyte solution (like baking soda and water) to turn rust into a "goo" that breaks the adhesive bond, allowing the liner to flake off.
YouTube
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This method is generally most effective when the liner has already begun to delaminate or flake due to underlying rust.
When considering this process, it is important to be aware of several factors:
Process Duration: Electrolysis is often a slow process, sometimes requiring several hours or even days to sufficiently weaken the bond of the old liner.
Safety Precautions: Working with electricity and water requires careful setup to avoid short circuits. Additionally, the process can generate small amounts of hydrogen gas, so performing this in a well-ventilated area away from open flames or sparks is essential.
Laverda Dave:
I have found the tank of the NC30 project to be thick rust inside with very large flakes present. The previous owner took it off the road because the rust kept getting through and into the carbs, stripping NC carbs isn't fun whatsoever.
My usual go-to would be Deox-C as it has been in the past but I know this tank is well beyond that and even if it does remove the rust (and it will take a few attempts) I know the rust will come straight back. I am loathe to use a liner having heard too many bad stories about flaking and being nigh on impossible to fully remove.
I have been in touch with a company I have used previously to remove a dent from the alloy tank of my Triton and who really are excellent called 'Motorcycle Dent Removal'. They have developed a process to remove the rust, prep the tank and to then nickel coat it. They give a lifetime guarantee for their work and the product.
The first question I was asked was is there a liner in the tank because if there was they wouldn't touch it.
I've sent the tank to them, they are located in Pickering, North Yorkshire.
I have asked them to let me know about the condition of the tank following the rust removal process and before they go any further.
I'll report back how it goes.
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