Hi Robin,
You can use a doming resin to paint the leaf with the resin. I would suggest doing one side, allow to cure, then do the other side. If you want to use them in a bracelet mold, I would suggest cutting the leaves to fit the mold first. It will be harder to cut them once they have been coated with resin.
On a side note, make sure your leaf is dry first. For example, you can put it between the pages of a thick book for several days to get it to dry flat. Resin hates moisture!