Removing dodgy liner from a pristine painted tank

[AshimotoK0]

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.

I have been to that place Dave to get a dent out of a 750 tank. He's pretty awesome and has a lovely set up ...not too far from Mathewsons ... not cheap though ....  so interested what he quotes you and comments on liner removal.