Laz are regarded as the "whites" of western asia along with western georgians. I don't know much about laz since I haven't seen many of them, but I am kinda certain that you wouldn't pass as a regular/typical adjarian man. I think abkhasians resemble megrels in looks and in that case it is even less likely for you to pass well there as you have said already. I think it depends on the degree of passing in the certain place, because an individual can pass in many regions and countries and for example I can pass as kurdish but atypically... Your best pass in georgia is kakheti in my opinion but even there you wouldn't have a typical kakhetian male look. I don't know how to say this but they have a kind of look that is overlapping with other northern west asians, but it is still distinct in its own way probably because of high CHG they have. That frames their looks. This is especially true for western georgians and abkhazians.from what i have seen i can also pass in western georgia as ajar . and also laz if that counts as western georgian because i know for a fact that i pass as laz since laz are in turkey and i know how they look and a laz guy also said i pass easily
to be honest i sometimes have the feeling i could even pass as an atypical abhkazian