The oil rubbed bronze finish should last under daily normal usage. However, if it comes in contact with harsh chemical or abrasive solution then the finish may come off. The finish is covered under the warranty. We'd recommend keep a copy of the invoice as proof of purchase for warranty service if needed.
This strainer will not work if a garbage disposal is already installed in the sink. The top basket may fit the garbage disposal but the rest of the drain will not be able to install because the garbage disposal is in the way.