Graham, NOW .... Are you sure this IS your first bowl .. as like Les, can't see any ... any fault with it, classic 1st bowl design, we never like to waste wood, the blank is round, so why go beyond or less than that in size ..
![Wink ;)](http://www.awgb.co.uk/awgbforum/Smileys/classic/wink.gif)
.. never the thought to core the inside and few do so even after years of turning, this also comes down to having the kit as well and more ideal if we use more exotic costly timbers.
I'd consider you've got the finish just right, shines nicely. Why 3 coats of sanding sealer, if needed each coat should have been cut back in between coat and the first buffing compound should cut back the last coat and the next buffs refines the finish, maybe in what your type of your final wax or drying times, next coat, I've yet (after years) to invest in a system.. come to it renew some of the finishes I own ..
![Embarrassed :-[](http://www.awgb.co.uk/awgbforum/Smileys/classic/embarrassed.gif)
..
Cheers David