I've just recieved my package from Ardennes, i got myself a BBW and a Coticule. I'm keen to put them to use but i want to get a few things straight first.

1) The slurry stone they gave me looks like its Coticule on one side and BBW on the other. would this be correct or might the dark side be Shist?
If it is BBW on one side do i need to only use the BBW side for slurrying the BBW and the Coticule side on the Coticule only?

2) Are there any maintenance issues i need to be aware of. should they just be washed with water when finished? Should they be dried before putting away? Is there anything in particular they should be kept in?

I might just be being over-cautious but they cost me quite a few bucks and i like to look after my stuff.

Thanks guys
Grant