What can I expect when pursuing scalp micropigmentation to hide FUE scars as somebody who tans easily?

Scalp MicroPigmentation results vary from patient to patient.  Tanning and UV exposure may accelerate the fading just as a tattoo will face with tanning and UV exposure.

The idea of scalp pigmentation is to camouflage the skin complexion. This creates the contrast required to give the illusion of hair where hair is not. The pigment comes in different tones but not colors. Hiding hair transplant scars can work well depending on the size of the scars. Sunlight may affect the long term fading of the pigment as can natural skin characteristics.  

The SMP specialist can match the skin tone. However, UV exposure can accelerate the fading of the pigment. I would use a hat to help retain the pigment as much as possible. 

The pigments used in SMP rarely gets impacted when the hair is long in the donor area if used to address FUE scars. If you wish to keep your hair short, then discuss these questions with the  doctor who is going to do the SMP for you.  Well trained SMP providers take your skin tones into account.