The full gold Rolexes are not your best bet for authenticity. The color of the gold is off as per the gen and you mod platted gold. You could replace the bezel insert and the pearl, and maybe get it relumed, but that's about it. In general, rep watches are poorly lumed, although it's changing for the better. Also, even though this watch showed no wear on the gold at all when I sold it, it's probably best not to wear a gold rep every day. I clean the gold surfaces at the end of every day I wear them.
All this aside, if you like gold, as I do, these reps are fun to own and even though the gold is 100% the right color, 99.9% of the population would never know.