I have a Dunhill shell. Its texture does feel rather smooth for such a finish, and though it is bent, I find it smokes easily and without moisture problems.
I have about $150 invested in this piece, and don't plan to get rid of it. It is a gem, made in 1954, back when they may still have had some prewar wood and boiled stummels in oil. Who really knows?
There seems to be a certain feel to this pipe in hand that I haven't sensed with a lot of other pipes.
It could be my brain telling me that this is a very desirable smoker by all standards and thus just feels like a superior piece, or it could be some of that and that it IS a superior piece too.
I think the closest thing to the feel of the shell finish might be an orange, but a warm one.