Hi Steve,
I too like oil finishes, but thinking a bit further ahead, the oil used may present a problem.
Customers will usually ask how best to care for their bowl and it would not be practical to suggest they buy a bottle of Food safe oil so they can apply a coat after wiping the bowl with a damp cloth. So, for salad bowls, I use oils that are often already in the kitchen, or can easily be bought in the supermarkets.
One of my favourites is walnut oil, but that may be risky if nut allergy is of concern, so I will use sunflower or rapeseed oil. I appreciate these don't 'dry' as quickly as the 'turners' oils, but the customer is always pleased to hear they have an easy way of keeping their bowls in pristine condition. By the way, don't use Olive Oil, as that never dries and is likely to go rancid.
Hope that helps,