I disagree with Matt, Technics did not get to the dominant market position they enjoy following his script. I cannot see what you are talking about because I do not have a Facebook account. Is the problem cosmetic or does it affect functionality? If the latter you definitely should return it. If it is cosmetic, then only you can decide if the blemish is acceptable to you or not. If it is not, you may return it and get a better one - or not - who knows? Is the effort worth it to you? Only you can decide. One thing you said makes me hesitantly suggest what I would probably do. If the TT works well and the sound is all that you expected, turn the lights down low and enjoy your favorite music. In the end nothing else is as important as the music.
Technics SL-1300G Turntable issues
I recently purchased the Technics SL-1300G. I like the sound of the turntable. Unfortunately, I found the common complaint that the lift mechanism feels cheap. Additionally I found a perceived quality issue shown below. The silver bands on the top and bottom of the beveled platter edge vary in width by a mm+. In my opinion it makes the table look cheap, not the quality you would expect at the $3300 price tag. Note the gap between the platter and the plinth is uniform as the platter rotates. Would you return the TT hoping to get a platter with more uniform machining?