Adding finings to elderflower champagne

[Will333]

Can you add finings (eg bentonite) to elderflower champagne and give it a secondary fermentation? (I am planning to prime the bottles anyway - I left it too long in the demijohn)

Also, how much should you prime champagne?

Thanks!

[Donald]

Yeah I've used finings before with this and it worked fine.
Also primed with 120g for 15litres, that gave a good fizz rather than a rocket!