There are a few reasons surface finishing is essential. First, it can improve the aesthetics of a product. This is important for products that will be used in public or seen by others. Second, surface finishing can also protect the underlying material from damage. This is especially important for metals, which can be susceptible to corrosion and other types of damage if left unprotected. Finally, surface finishing can also improve the functionality of a product. For example, saw blades and other cutting tools are often given a special coating to help them resist wear and tear.
Surface finishing is essential for improving aesthetics, protecting the underlying material, and improving functionality. If you're considering using surface finishing on a project