Is it a good idea to coat the bottom of a steel hull houseboat
with a bed liner like Rhino Tuff Stuff, or something like it? One
person told me they start to peel off after a few years, but I
would think there are products of different quality, as well as
possible improvements in products of years ago which may be
the ones peeling (or whatever) today.

Do those type coatings come in different colors? It seems to
me that if they would work well in a truck bed, something like
that ought to be great for the roof of a houseboat which gets
similar traffic and things dragged around on it, etc....that is, if
the stuff is available in white.