Fine clay bars and medium clay bars differ primarily in their aggressiveness and intended use during car detailing:

Fine Clay Bars:

Aggressiveness: Fine clay bars are less aggressive compared to medium clay bars.
Intended Use: They are designed for light contamination removal and regular maintenance detailing.
Typical Contaminants: Ideal for removing light surface contaminants such as dust, pollen, water spots, and mild oxidation.
Suitability: Fine clay bars are suitable for vehicles that are regularly maintained and have minimal buildup of contaminants on the paint surface.
Medium Clay Bars:

Aggressiveness: Medium clay bars are more aggressive than fine clay bars.
Intended Use: They are used for moderate contamination removal, tackling tougher contaminants that may require more effort to remove.
Typical Contaminants: Effective for removing moderate contaminants like tree sap, road tar, insect remains, and heavier oxidation.
Suitability: Medium clay bars are suitable for vehicles that have not been detailed recently or have accumulated moderate levels of contaminants on the paint surface.
When choosing between fine and medium clay bars, consider the condition of your vehicle's paint and the level of contamination present. Fine clay bars are gentler and ideal for regular maintenance, while medium clay bars are more suited for occasional deep cleaning sessions to tackle tougher contaminants. Always ensure proper lubrication and technique to prevent marring or scratching the paint during the clay bar process.