I use camoflage/ high coverage on both 12-18year old s/h scars and more recent surgical scarring.
Atm im using mehron brand, it is sooo hard to get off once its on especially with the fixing powder and spray, but this is good for clients as it wont come off on sheets/clothes or with sweat/a quick shower. Only issue i have is with some fake tans ive found this brand to have too many reddy hues, so maybe shop around for one matches your skin tones? I'd also reccomend using a corrective kit (like you would use for spots etc) underneath any camoflage make if they are newer or youve recently been in the sun so they go pinkish. I use a green on boob job scars as still pinkish, also works to even out the texture. Youtube has some fab videos on this btw.
(Alot of ppl like the rio one but pwrsonally it gets everywhere and has no staying power imo) I did have an amazing brand i got from amazon, ill see if i can find out what it is if you want.