Hey fellas, I'm new to straight shaving, and just have two lather questions. I'm using Conk's Bay Rum soap; after reading the various posts on this site, I now know that this isn't the best soap, but I'm still learning. Now, for my questions:

1) Should I be making enough lather at the begining to cover all of my passes, or build new lather between each pass?

2) When there is excess lather in my mug when finished shaving, should this be cleaned out or reused?

Thanks for all of the help.