Which step is NOT part of pinchweld preparation when rust is present?

Wiping the metal with a Progrip towel is typically not a specific step in pinchweld preparation when dealing with rust. Pinchweld preparation focuses on addressing and treating rust to ensure a solid bond for adhesive applications, which is critical for vehicle safety and integrity.

Applying a rust inhibitor is essential to prevent any further rusting after the area has been treated, while sanding the rusted area allows for the removal of rust and ensures a smooth surface for adhesion. Cleaning with a solvent is also vital, as it helps remove any contaminants that could interfere with the bonding process and ensures that the surface is ready for further treatment.

Thus, while wiping the surface might contribute to cleanliness, it is not a specialized step specifically aimed at treating the presence of rust, making it the choice that stands apart in the context of focused rust remediation.