Hi!
I wonder if you mean any tricks to bring out the waltz character? I my opinion, no. It's not dance music, it's pure art. Like a painting of a waltz, but with notes. So I don't think they should be specifically "waltzy", if you know what I mean.
Have you seen the Rubinstein video on youtube where he is teaching someone on the gm ballade? He says something so beatiful: "Music is a noble art, you musn't bang the piano, you have to sing it, play it nobly" or something like that. I think it gives such a wonderful picture of how he played Chopin..
Specifically, I also think one should avoid exaggerations in the waltzes; i.e avoid extreme tempos, be subtle in the left hand and don't bring out inner voices in an exaggerated way, don't overdo the rubato etc. Play them elegantly and with a sort of subtle joy.
About pedalling, well, study Chopin's own markings and see what you think! They often seem a bit odd for us as we are used to "clean" pedalling all the time. If you are going to blur harmonies a bit, I think good voicing of the chords is even more essential, e.g. bring out the top voice (thumb) a bit more, and phrase carefully so that the accompaniment becomes melodious.