I can tell you we installed SP on a White Crema Marfil floor recently. We hand buffed it (don't have a machine yet)until all the walk marks etc we did were gone. Not too bad but we need a machine for the next one. Maybe you need to buff a little more. It came out nice.
As for the scratches in the marble, you may have had a piece of dirt stuck on the turbo. Do a search about "turbo and marble" I think is where I found it. One little piece of dirt could have left the swirly pattern you have.
About fixing it? I don't much about that yet don't even want to try to go there yet. We have lots of good people who will help you there.
Again, I don't know if the above is right or not but I THINK it is. I'm trying here guys....haha...
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