The only parts I wouldn't do are the places you expect, and my face or hairline.
From the post-gazette.com
He was riding in a homemade go-cart and got a hairline fracture when it crashed.
From the tennessean.com
Ahmed could see a sprinkling of bumps over his eye to just beneath the hairline.
From the well.blogs.nytimes.com
The engineers found a total 36 hairline cracks in the wing-rib feet of the A380.
From the smh.com.au
Through the vehicle's tinted window, his rapidly receding hairline was visible.
From the timesunion.com
First, your surgeon will take a scalpel and make an incision above your hairline.
From the telegraph.co.uk
The Rays are letting Johnny Damon play through a hairline fracture to his finger.
From the sportsillustrated.cnn.com
It turns out that when Ariza was examined over the summer, the hairline was gone.
From the ocregister.com
It was said of him that the only fight he lost was against a receding hairline.
From the economist.com
More examples
A very thin line
The natural margin formed by hair on the head
In human anatomy, the forehead is the fore part of the head. It is, formally, an area of the head bounded by three features, two of the skull and one of the scalp. The top of the forehead is marked by the hairline, the edge of the area where hair on the scalp grows. ...
The line along one's forehead where hair starts growing; the thinnest line that can be drawn using some graphics software; very thin, as thin as a hair
(Hairlines) the thinnest of the strokes in a typeface.
(HAIRLINES) thin, shallow scratches on the surface of a coin, usually caused by improper cleaning, or mishandling. ...
(Hairlines) Fine lines across the face of a stamp caused by plate cracks.
(hairlines) Fine cleaning lines found mainly in the fields of Proof coins, although they sometimes are found across an entire Proof coin as well as on business strikes.
(hairlines) fine lines appearing in fired enamel on glass, ceramic ware, or on the surface of drying organic inks or coatings.