Below is a quick video clarifying what to expect and/or what options you have when ordering wall cabinets. In most cases, unless a custom modification is requested, the interior of a wall and/or base cabinet is a natural melamine or vinyl wood grain finish that protects the plywood from water. Have a look at the video below. If you have questions let me know.
For example, one method to finish the bottom of a Norcraft cabinet is to include a 1/8 inch thick finished panel and under cabinet molding that has a dado in the molding... The image below shows this application.
Pricing depends on which under cabinet molding you select. To view the various under cabinet molding options from Norcraft -- CLICK HERE
The majority of our customers leave the bottom and interior cabinets as it comes with out any finish paneling or modifications.