Kristi bear with me as I have no idea what I am talking about, but ...it seems to me all pics that I have looked at have a fairly consistent 'cover' of crackle as it were. It seems to me some pieces also have been heated so the crackles have been covered over and the outer I guess must feel smooth but the crackle effect still shows, and others haven't been so that the surface feels rougher where you can feel the crackles perhaps- but they all have some consistency of effect over most of the piece (the ones I have seen in pics).
On my little pot/box the surface is rough but only because of the crackles. And the 'crackles' are grooves you can run your nail in. It is rough in other words, apart from the satin bits. But also the effect is not consistent. It is random, as if a spider with acid on it's feet ran all over it in a panic
and some of them are wider than others (a spider with one or two really big feet
) It is completely smooth and polished shiny inside. Not all the 'grooves' are whiteish. In fact it looks like a map of rivers and tributaries. It looks as though it was an applied technique on the surface after it was shaped, but that is to my totally untrained eye. I really have no idea how it was done, so any clues would be gratefully received.