white ash should be superior to black ash. So guess you're lucky!
glad you like my bow. I used european ash indeed, pretty low quality (too much earlywood). Ash is a great wood to work with, and with some scorching you can really make the rings come out.
the 'scorching' is actually close-range tempering for a very short time. put the heatgun very close to the wood and keep it moving, with strokes of , say 4". As soon as the rings start to darken, and the latewood get's a goldish colour, you move on. I've finished such a bow with linseed oil and it came out great. the back was pretty white, but the belly had a gorgeous golden colour. Especially the dark rings in the fades gave the bow it's great looks.
Nick