Removing old tank sealant

[magne.aga]

I'm please to read the last Cheval that Draganfly have found a new tank sealant that can can withstand the new fuel's
But does anyone have any working methode of removing old partly dissolved tank sealant?

[adrie.degraaff]

Hi,
take the tank bottem out, sandblast the stuff away, repair the leaks, weld the bottem in again, forget the sealant.
Kind regards Adrie.