Firstly I have to say that I did use bio oil on my scar from very early on and I truly believe that is one reason that it has now faded so well. Luckily for me I did not develop my usual keloid scar, don't know why but I am grateful that did not happen this time. However my surgeon did not have a steady hand and my scar is slightly curved which is frustrating.
I have to say I never did go along with the idea of covering the scar with any type of makeup. I know it was an option and several companies do profess that their products do work, but for me they were way too temporary and I feared going out and the makeup came away for any reason. So I cant comment on how successful that method might be.
First I tried the scarf idea as a cover-up. My surgery was mid July and it was a very hot, hot summer so wearing a scarf was too warm and too fussy a summer look and thus was annoying. I do still use a lot of scarves in cooler and cold months, and if you would like to explore this idea I would suggest looking at a video on YouTube which shows you many ways to tie them. www.youtu.be/5LYAEz777AU
But in the early days when low necklines, including even ordinary tee-shirts, still left the scar very visable I hit on the idea of buying spaghetti strap tank tops in very lightweight fabrics, and wore them underneath. Of course the neckline is often the same as the shirt so you need to shorten the straps so that the tank top sits higher. It is easy to shorten the spaghetti straps but if you are not a natural sewer, have a look at this YouTube video. www.youtube.com/watch?v=zPcB5HfzYsI