I really doubt you will get any orange flavor at all. If your looking for a orange flavor why not just use the zest for a orange or maybe use some coriander to add some lemon taste?
I've used some acid malt in my hef's to give it a little tartness.
I'd use it with 10min left and make sure you stir real good as you are putting it in. You don't want to scorch it on the bottom of your pot.
The honey will not import any flavor at all it's 100% fermentible, it just raise your ABV.
A little update on my Berliner Weisse. The sulfur note is almost gone and it has a little cheerio flavor. The tart sourness is starting to show up to the party.
How critical is it to pitch enuff yeast when using Brettanomyces, Lactobacillus, and Pediococcus?
Example: Can I pitch one smack pack of Brett L into a 10gal batch?