You would be surprised how many people ask me if Pond Shield epoxy can be used in a bath tub. Do you know which tubs I am referring to? Yes, those old enamel coated iron tubs. Sometimes people like to sink them into the ground and use them as small ponds; and why not? They are perfect for it.
If this is an idea you have been kicking around for a while but really did not know where to start, hopefully this article will serve you. Usually, you will find these old bath tubs in one of two states, with the enamel still intact and pretty much bare.
If the bath tub is bare, this probably means that there is going to be a little rust on the iron. You are going to have to clean all of that up prior to putting any Pond Shield on it. Once all of the rust is cleaned away, it is also recommend that you prime the bare metal with a self etching primer.
The difference between a self etching primer and a rattle can of primer you pick up at the local hardware store is that those rattle can primers do not stick to bare metal properly. You need a self etching primer that will essentially burn into the metal and stick. This is how you will get a better finish coat to stick as well.
You can purchase a self etching primer form just about any automotive paint and body supply store. If you are not sure where to find one, call one of the local auto body shops and ask them where they purchase paints locally. Those are the suppliers that will have the proper primer.
If the bath tub still has an existing enamel coating on it, you will need to abrade that surface to rough it up. The coating is going to need some tooth to grab hold of after it is applied.
Once you have applied the primer and it has had time to set up, you can apply Pond Shield epoxy over the top. After the epoxy has fully cured, you can put the new bath tub/pond into service.