I don't know what caused your scars, so I apologize if I'm mis-speaking here. I realize there are scars that are physical reminders of horrible events and that it can be very hard to get past such a thing.
I've got some scars that for a time I was very self-conscious about. Then I realized that I should wear them as a badge of honor and not try to cover them up. I survived. I persevered. I fought for my health and won. But in my case, those scars aren't that bad, so I don't get that many looks from people, so I can't really speak about that.
So I'll tell you a story about my DP. His abdomen is covered in large, scars of all sorts. Some are keloid. Some are actually big crevices. Many you can see staple marks. He is very self-conscious of them. To the point that I have to keep telling him that its ok to take off his shirt when we swim. So finally one day I convinced him to go swimming without his shirt. It was spontaneous and he hadn't brought a second shirt to put on after and needed to keep his shirt dry. We were with my family - he was meeting them for the first time. Afterwards several people asked me why I had such a tough time getting him to take his shirt off and swim. Nobody had even noticed the scars and they saw him for several hours. I guess I should say, that people did see the scars, they were probably at least minimally aware, but I specifically asked my sister about it and she just didn't get why anyone would think they were a big deal.
So if you are keeping covered for yourself because you don't like looking at the scars, do what you need to do, but if its for other people, well (&*# them. Whatever caused them, you survived. You are here and you have the right to enjoy yourself.