STAUBVertical Roaster, Graphite Grey, 9.5 - Graphite Grey (

I'm wondering whether the vertical roaster in the enamel finish is easier to clean than the matte black. Thanks for your opinions.

Can I use this on the grill?

My microwave has a convection function where it uses hot forced air through the cavity. Can this be used to roast a chicken in there?

How large a chicken can it hold?