Ive been debating this for a few weeks and scared to get serious with tweezers
mine are faint towards the outer edges, well in color... dye them darker?
ive tried laying stencils on them, cumbersome, Ive tried shaving a shape, sketchy, I draw them a bit to get them darker and arched slightly but am scared to dive in as its a one shot affair....

feel a bit silly going in to a pro, and what if they do something I dont like....
anyways, tips, suggestions, vids, appreciated