"dadiOH" wrote in
news:BKm0o.21180$xf1.20945@hurricane:

dadiOH wrote:


2. The sink is rusting which means it is steel, probably with an
enamel coating.

It looks like it is rusting along the front as well as rear. Steel
sink bedded with silicone? Needs to be pulled up and replaced or -
possibly - all the rust cleaned off and rebedded. Use plumber's
putty.


Had a bath sink all cruddy like that. It was one of the cheapo cast iron
with porcelain. Removed it. Wire brushed with drill till clean. Brush
painted all exposed cast iron with RustOleum Rusty Metal Primer.
Fortunately particle board under Formica was not damaged. Cleaned up
stained counter with BarkeepsFriend. All worked out real well.

Saw a segment on How They Do It where they were doing maintenance on
cruise liners while in port. They use phosphoric acid (unknown
concentration) on exposed metal. Converts the rust and leaves a black
film/scale which actually becomes a rust retardant. Then of course you
look at the active ingrediant in naval jellies and it's...phosphoric acid
..