Tough to do, as it's designed to be a slosh around system. Unless you have access to the inside another way.
You can find complete instructions for the Gold Standard Gas Tank Sealer here: http://www.kbs-coatings.com/Gold-Standard-Tank-Sealer-Information-Instructions_ep_39-1.html
You can also find Instructional Videos here: http://www.kbs-coatings.com/KBS-Videos_ep_90-1.html
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