Apparatus and methods for modifying keratinous surfaces

An apparatus for modifying a keratinous surface comprising:

• a rotatable applicator which is in fluid communication with a first modification composition;
• a sensor;
• a CPU;
• wherein the sensor is positioned forward of the applicator such that as the applicator rolls across the keratinous surface the sensor reads the portion of the keratinous surface in front of the rolling applicator, the readings are transmitted to the CPU, the CPU analyzes the sensor readings of the keratinous surface, the CPU sends a signal to the an operator of the device, the operator then chooses to treat or not to treat the identified portion of the keratinous surface, when the operator chooses to treat the portion of the keratinous surface she activates the CPU to apply a small portion of the first modification composition to the applicator such that when the applicator rolls over the keratinous surface the first modification composition contacts the area of the keratinous surface that needs treatment.