Quote Originally Posted by Erpel
At the risk of delving into the obvious this is something I try to think about now and again. When I end up holding the nuts or a very strong hand like a set on the flop I ask myself this: How can I play this hand in a way that (if called to a showdown) will maximise my fold equity when, in future hands, I see a flop like this and I'm not actually holding the nuts?
I read this far and skimmed the rest. The easy answer is to play them both similarly enough that it's hard for your opponent to know what you have, and to play each with a frequency that is +EV.

You also say that when holding the nuts you have a big chance to manipulate your image. The thing is that you have that opportunity with most hands you choose to play, which is more along the lines of what you're talking about here.

You can figure out what bluffing frequencies are mathematically best in certain restricted situations and that can give you insight into how to play in less-restricted situations. It can also give you insight into how to make adjustments against people who call too much or not enough.