The thing is, doesn't learning Rokushiki usually take years of gruelling training? I don't think its something you can really learn from just a few short pointers (for the most part).
Well Luffy learned his own version of Soru with Gear 2 after his first defeat with CP9. Was that some days of observation and reflection?
Sanji's Sky Walk, similar to Moonwalk, was learned during the timeskip. I doubt it took the entire time for him to learn to run away in the air.
The Strawhats have gone through rigorous training, in particular the timeskip, so implementing what they can from Six Powers does not seem impossible, IMO.
Regardless, it's time for Sanji to step up to be a Conqueror. It will be interesting how he doesn't get hit and damages Killingham. Counter kicks each time he dodges???