If you go to a dance store, they have the nude colored bodysuit tops. Skin tight. With a lil theatrical 'fake skin'...ok, maybe more than a lil...you can cover it and it will adhere and blend to your flesh. If you follow Karisu-sama's suggestions with the tape and the top it sohuld work fine for you. I did that this year for my Sephiroth costume except with the bandages under. I made the mistake of accidentally using CLEAR liquid latex. Not bright.
Anyhow that would allow you to go bare topped without baring all.
Where am I, who are these strange men...and why am I wearing this T-shirt that says "Uke"?