can you clean a fuel tank?

ValiantOne said

Put a few cups of gravel in mine with muriatic acid and spun it on a cement mixer. Woked great.

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This is just pure genius..... I have used a jogger for paper (Printing Industry) and put BB's and Bleach in a tank and let it just vibrate away.... Spotless when finished. I have a cement mixer and am going to take a whack at it this way....

Thanks,
JW