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I bought an old bike with aluminium tank that had sat for a long time. It had some liquid stinky gas in it and was oozing molasses looking stuff by the petcock and a couple of pin holes. I soaked in fresh gas for a couple of weeks and then soaked with simple green water for a short time (also shaking with screws & bolts inside). The inside still does not look that clean. See pictures. Further back is what looks like a thin layer of the molasses looking varnish. Will the standard KBS tank sealer kit be adequate for cleaning and sealing a tank like this? If not, what other steps should I take? I'm not planning on repainting the tank so any cleaning solvents that eat paint are not desirable.

Hello, I am currently restoring a 1974 Land Rover Series 3 and have a question about RustBlast in combination with RustSeal applied on aluminium. First of all I allready treated the outside of my (steel) fuel tank with KBS Clean, RustBlast, 2 coats of RustSeal and one of coat of BlackTop and it works great, easy to apply and the result is superb. And I will also do the chassis frame, leafsprings and axes (which are all steel) with the KBS system. My Question is about the underside of the body parts of the car which are mostly made of aluminium. All info I've read sofar about painting aluminium body parts of old Land Rovers, say that you first need to apply a self-etching primer to etch through the aluminium-oxide layer, before applying the final coating. Now my options for the underside of the body parts are to have a self-etching primer applied and then a regular paint followed by some tectyl (or similar) treatment to prevent the underside of the car from all kinds of bad stuff OR (as I would prefer not to apply tectyl (or similar) stuff to the underside of the car) apply the KBS products system to the underside. Also some of the aluminium body parts are reinforced with some galvanised steel stiffeners of which I already removed all the rust from. What would be the way to go ? first use the self etching primer, than Rustseal en maybe TopCoat for extra protection ? Or use RustBlast followed by RustSeal and maybe TopCoat ? Do you advise on finishing the underside of the car anyway(chassis frame and other body parts) with some tectyl like stuff even after applying the complete KBS system ? Kind regards from the Netherlands, Bas Ruiter