Basicallly, PTSD will not be removed or covered up, it is too strongly entrenched within the individuals mind, you cannot unring a 35 year old bell. You cannot erase extremely past memories, they have recycled for thousands of times, their pattern is too deep. The sufferors cannot push it out of their mind, the meds do not cover it up. All that can be done is to convince the victum toleave it behind and progress into an alterted view of life, "There once was an anchor" is all I can suggest. The anchor is still there, allways will be, it is personnal choise whether or not a line is attached.
Therapywise, I can only suggest the victum be made alert to the fact that it is personnal choise whether or not to be attached to the anchor; some find security within a familiar pattern even if it is negative and choose not to leave. Others fight to get away but cannot because of their closed minds. Only when there is more desirable options available is the time to gather distance from the anchor, suggest seperation only dureing the high spots. Do not seek any actions when things are at ebb, it is too easy to seek familiar patterns then. It lies within the individual as to when the seperation is correct for them, its too big for mental health people to understand if they have not experienced it. Get away when the getting is good, it will never leave you, only you can leave it.
Edited to add; After rereading your question I see I did not answer it. First of all, never a group setting, we do not want to speak in front of others,. it could trigger their memories to a worse place; its our own private ___. We do not go to reunions because we might see someone we left behind dureing the rotations, someone in a wheelchair, or legless, or totally destroied because we were not there to cover them. We have no interest in talking with someone with out scars, be they mental or physical,you must have and show scars. After we learn to trust you have walked your own path of static, then we can start to trust your words. We trusted the leaders words then, look what it got us. If you haven't been waist deep in it, you will not know about it, therefore your and our time would be wasted. Put the knarrley old dude who has lost a wife to a drunk driver on their 40th anniversary up front to speak with us, or the woman who lost her son in the mess,don't offer us second best anything, we have earned first class contact with counceilers. Backspace the numbers out of your URL and enter; 39612, then 45202, and then 44016. After you have read the three portions come ask the question again. PTSD has seperated me from normal existance this lifetime, there is no recovery, realizing that I chose to return to the human race, maybe some day I'll make it back home.