Cosmetology

A Sim's Cosmetology Talent badge level determines how likely they are to do a successful Makeover. Also, as a Sim's badge level increases, the animations will change to reflect the Sim's increasing skill.

No badge
High chance of messing up the makeover.

Bronze
Medium chance of messing up the makeover.

Silver
Low chance of messing up the makeover.

Gold
Very low chance of messing up the makeover.

Positive effect
A successful makeover opens the "Change Appearance" options screen. Here you can change the appearance of the Sim you did a makeover on. The customer will be pleased and if you did not offer a free one, pay you.

Negative effect
An unsuccessful makeover displeases the customer and their appearance is changed, usually a weird haircut or full face makeup. (For selectable Sims, this can be undone by using the Change Appearance option on a mirror.) The Sim who did the makeover still gets paid, unless it was a free makeover.

High cleaning skills help gain cosmetology badges.