Wufu held a small target mirror and took a careful look at himself within. Upon closer inspection, it was actually quite easy to differentiate, no matter what changes he made, it was never as convenient as disguise techniques in the modern era.
Not to mention anything else, back in those days, face-changing required only cosmetics, then add a pair of colored contact lenses and a pair of glasses, and transforming one's appearance was incredibly easy.
If one was more particular, a Human Skin Mask made with high technology was the most exquisite choice.
However, the rouge and face powder available now were far from being as diverse and refined as those times. The only advantage was that they were made from natural plant extracts, absolutely natural, unlike the chemicals from a past life, so there was no need to worry about damaging the skin.
So, you can't have the best of both worlds.