Hi goldentone,
Thanks for your question about this aspect of playing. Yes, I too believe that playing new and different music means new learning. And when I next encounter similar demands in a score, I can always apply that technique.
This also points out an important truism: The chief duty of any piano teacher is to teach the pupils how to teach themselves.
I've been on my own preparing Late Romantic repertoire for years now. Typically, when I encounter something new, I turn to references in books, or a music terms dictionary, or solve it through analysis and common sense. It's all very useful.
Thanks again for visiting.
David