I set up quite a few of my styles (especially jazz ballads) so that one variation (usually C) will have the piano parts played with two hands so when I solo over it with some sort of lead voice, it sounds a little more realistic.

I generally don't concern myself too much with shutting off a guitar part while using a guitar as solo instrument, because I'm generally using a different type of guitar, and quite often bands have more than one guitarist...two piano players not so much.

The volume pedal set to control only the Right Hand voices is a very useful tool, especially if you are comping behind a singer.

Ian