I have never had a guy ask about my scars but on my outer labia I used Retin A for about a year to fade the scars, etc. I take good care of my skin, exfoliate (etc.) for FFS scars and of course I try to use makeup on my face and where I have FFS scars.
I would imagine if you are with enough guys eventually you may run into a jerk who has no boundaries and asks questions that are none of his business but my experience is that guys only look for scars (assuming you were sutured well and healed good) if they are already suspicious about you, mannerisms, voice, "vibe", overly sexual and too take-charge, rumors... Usually a couple of red flags or more or simply a rumor or something someone else said.