Lapping is a process where two surfaces are rubbed together with an abrasive material in between. The abrasive can come as powders, pastes, or slurries. It removes tiny amounts of material from the workpiece. Lapping aims to create smooth surfaces, fix minor shape errors, and achieve precise dimensions.

Vapor polishing is a finishing process that uses chemical vapors to smooth the surface of a plastic part. The process starts by placing the part inside a sealed chamber. A chemical like methylene chloride is heated until it becomes a vapor. When this vapor contacts the plastic, it slightly melts and reshapes the outer layer. This reshaping fills in rough spots, scratches, and minor marks.

Bright dip anodizing is a chemical finishing process. First, the part is cleaned and degreased. Then it goes into a chemical bath that makes the metal smooth and shiny. After that, the part is anodized to form a protective oxide layer. Finally, this layer is sealed to keep the surface resistant to corrosion and maintain its shine.

PVDF coating is a high-performance protective layer made from polyvinylidene fluoride resin. It is known for excellent weather resistance, chemical resistance, and color retention. It protects surfaces against corrosion, UV rays, and abrasion.

Honing uses abrasive stones to remove small amounts of material and improve surface finish, while lapping relies on abrasive slurry between surfaces for high precision. Honing is better for cylindrical parts with tight tolerances. Lapping is better for flat surfaces or when extreme accuracy is needed. Both processes reduce friction, improve durability, and support high-performance parts.