I have a site where certain items need to have a note saying "Final Sale. This item cannot be returned."

This text needs to be visible not only on the product info page, but in the shopping cart and on the invoice. I thought the easiest way to handle this would be to create a "final sale" attribute.

Using the read only attribute, the text appears in the product info, but not in the attributes list when the item is added to the cart.

Does anyone know if it's possible to display it here?