KBS Coating for rust in the tank.. Have you guys heard of and used or advice on the matter..
Hadn't heard of that one before now. POR-15 is commonly recommended around here as a reliable etch and seal system. Stay away from KREEM, as it is effected by the alcohol in the fuel.
One other point to keep in mind is the very thin metal the Vision tank is made of. If you have rust inside it is close to being outside too as it eats through the lower sections of the tank where water can collect. Too bad the fuel valve is not the lowest spot on the tank.
Looking at their website they seem to have an extensive range of products. I haven't tried that brand but would be very interested to learn your impressions if you decide to try it.