Keith -
I saw the Bruni article several years ago and lost track of it. I think it is a great article, but the links (water softener, bleach, and detergent) are missing in the pdf version. A quick Google search pulled up the following site, which has the original links intact.
http://cbruni.googlepages.com/
I'm still nervous about prolonged exposure of the Thetfords seal to bleach, but the water softener and detergent ideas still sound great.
Thanks for bringing this goodie back!
Bill