[AndrewWoodard]

Hi, All!

I gather you actually mean muriatic acid? Aside from hearing it's use in cleaning ecthed ceramic (like toilet bowls), I've left it alone.

For the two rusted tanks I've recently dealt with (my KZ305 and a Honda CL100 I'm restoring), I started out with bead blasting the interiors. Granted, it was perfect, but it got most all the surface rust even deep insied the tank. I removed the petcock and locking tank cap in preparation.

The next step was to air hose them out thoroughly to get rid of anything loose still inside, including the plastic beads from the bead blaster.

The third step was to mask over the openings where the petcocks mounted, and put several cups of phosphoric acid solution inside the tanks and swish it around thoroughly for several minutes. Phosphoric acid still isn't something you want on your skin (or certainly in your eyes or mouth), but proper protection like gloves and a face shield provided the safety I was looking for. The phosphoric acid rinse neutralized any remaining rust to inactive base metal. After draining and rinsing both tanks, a light rinse with oil made them ready for reassembly and use.

I'm honestly not afmilier with any of the kits mentioned, but if they can effectively handle the problem, that may be a better way to go for you instead of having to get the materials and access to a bead blaster.

Thanks!

Andrew....