1. Fine Grade Clay Mitt:

Abrasiveness: Fine grade clay mitts are less abrasive and are ideal for vehicles that are new or well-maintained. They are designed to gently remove surface contaminants without causing any marring or damage to the paint.

Use Case: Best suited for regular maintenance, fine grade mitts are effective at removing light contaminants like dust, dirt, and some minor overspray. They are recommended for surfaces that do not have heavy contamination.

1. Medium Grade Clay Mitt:

Abrasiveness: Medium grade clay mitts are more aggressive and can remove stubborn debris and contaminants that fine grade mitts may not be able to handle. However, they can also cause microscopic marring on the paint surface.

Use Case: These mitts are better for vehicles that have not been maintained as frequently or have more significant contamination, such as industrial fallout or heavy brake dust. After using a medium grade mitt, a follow-up polishing step is often necessary to restore the paint's finish.

Summary

• Fine Grade: Less abrasive, ideal for well-maintained vehicles, minimal risk of marring.
• Medium Grade: More abrasive, suitable for heavily contaminated surfaces, may require polishing afterward.

Here are some images of clay mitts for reference: