just looked at videos for cleaning and installing liner kit for Valk fuel tank, my question is, is there a replacement tank on the market for this bike, just in case.
I would never use any form of liner.
I filled my tank up with Evaporust, left it for five days and it went from this.....



....to this.......




Once completed I swilled it round with water, then some Methylated Spirits, then petrol⛽️ before finally spraying Fogging Oil inside to stop any flash rust returning.
It was left like that for weeks before I got around to refitting the tank and filling her up.
Extremely pleased.