I ended up buying something called "Rust Bullett". Compared to POR-15, it
has almost no surface prep. Aside from knocking off loose stuff there is no
prep, but it has to be applied in two layers, one to bond all the crud and
then a second layer to fill in pinholes and leave a smoth finish.
Dan made me buy it.
I saw a posting from you wherein you were asking/speaking:
about removing rust from a floor area and then applying a protective top coat to the surface - -
which, will then have a carpet or wooden floor (???) put on top of the surface.
I have used POR 15 for fuel tanks and metal surface protection - It is great stuff. The benefit, as advertised, is that it is impervious to allowing air to pass between the application and into the metal surface. Regular paint is not air tight so as to prevent further rust development. That is why we wax our cars. POR 15 claims to be "air tight".
I am in the process of installing a radio tower here at home, burying the first section in concrete.
It is a galvanized tower.
For long life, on the first section which is buried in the concrete, I am applying a brush applied coating of some stuff called "Black Beauty Fence Post Sealer".
You buy this goop at a farm supply place. It is used to coat wooden posts, steel posts, anything that is buried, or subject to attack by the elements . As in all such products - "loose" rust is advised to be first removed.
It is a thick bitumastic, tar based paint that appears to really be quite self sealing, curing, and then becomes air tight so as to prevent further rust development underneath the painted surface.
For application to the inside of bus wall panels, between the metal floor and top floor of wood, carpet, etc., I kept thinking that this stuff might be pretty good for surface protection.
Then again, the product may have some disadvantages which have not totally come to mind just yet - smell - not resistant to solvents - may get tacky in hot weather - - - ???
Just another one of those products out there to investigate for future projects, as they develop.
Bob
