Mate, you can sometimes have another surgery where they 'cut out' your scars and allow the areas to heal all over again, like a do-over. But that's a question for your surgeon, I just know its possible. Of course that means going under the knife again, and the recovery - and allowing the area to heal properly this time. It looks like you have stretched the scars IMO - nothing bad, just meaning you lifted your arms too soon or something similar etc..
You could also enquire about laser treatment for scars. Not sure of the success, again I just know its a possibility.. And there's always tattooing over the scars you have now if you're keen on that. Even tatooing over the worse side - it'll be easier to explain on scar I guess.
But really mate, honestly if I was at a pool or the beach and saw a guy, or anyone for that matter, with big scars - I wouldn't dare ask for fear there were emotional 'scars' associated, or if it was a traumatic experience - you know what I'm saying... But I think we can all appreciate the self consciousness. First port of call - maybe call your surgeon.
Good luck man.
j.