What is a potential result of failing to remove the original protective coating from a form?

Failing to remove the original protective coating from a form can indeed lead to staining. When a protective coating is left on the form, it can interfere with the adhesion and bonding of materials such as concrete or other coatings applied over it. This can result in unsightly marks or discoloration on the surface, which would compromise the aesthetic and functional qualities of the finished product. In many cases, the protective coating may not be designed to withstand the chemical reactions that occur during the curing of concrete, leading to further staining issues.

The other possible outcomes do not align with the implications of leaving the protective coating intact. For example, increased durability, better finish quality, and reduced maintenance are all positive outcomes that are unlikely to be achieved if the original coating is not removed, as it can compromise the integrity and appearance of the finished surface.