And to just make sure it's completely covered up and hidden, prime it up and throw 3 coats of high gloss duco on it.
Lay it on extra thick just outboard of the bathtub fittings in an attempt to cover up the intergranular corrosion.
I may have once been a JAFA, however if that old Belfast doesn't have intergranular corrosion in its substructures, I will walk naked through Myer's in Cairns!!!!