Mudfish,
Do a internet search for FASCO Epoxies.
They make the steel flex.
Thier super steel flex is what most folks I know use, or they have a superslick version that is slicker, but tougher to work with, and make it lok nice. If you just putting on the bottom of your hull, it won't matter how it looks.
Do a search on these boards for steel flex, frog spit, ground grease, or bottom coatings.
You'll find allot of info already laid down in here.
Come on back and post again if you don't find what your looking for.
We will all help you get it figured out.
Later