Hi Guys
Its late and I am realy beat, but, "molasses solution" is it mixed with water???
I read the pages and found that it is a mixture (oprox 1:4) but never found exactly what it is diluted with.

Maybe I missed it.
This is a real DIY trick no doubt, but an entire tub...maybe remove it (presure wash) and reapply, this might help the stinkys.
Great link, we alway need more rust removal methods !
And if someone can clear up the mixture question...
Later