Use a permanent marker to draw a few clouds in the sky, and tufts of grass on the ground. (After etching, I thought my tufts of grass looked more like a cityscape, so you may want to use an extra-fine-point Sharpie® for some of the grass.) The lines that look like rain were not drawn; they are simply a result of the ferric chloride etching process.
Carefully and thoroughly mask the edges and back of the bracelet with masking tape, duct tape or Sharpie, to avoid rough spots on the edges of the bracelet.
Place the bracelet in a plastic container of etchant (ferric chloride) for approximately 1 hour. To ensure an even etch, use a plastic tool or plastic gloves to turn the bracelet over approximately every 20 minutes.
Allow to dry, then seal the bracelet with Renaissance® wax.
Choose spots for the flowers (or other rivet accents with a 3/32" center hole), and use a Sharpie to mark center dot for each. If the flowers fit oddly due to the concave shape of the bracelet, re-shape them with ring bending pliers. Just one firm "squish" down the middle of the flower should work perfectly. Don't rotate the flower and re-squish, because the bracelet is only concave in one direction.
Punch 3/32" holes with the cutting end of the Crafted Findings tool.
Try a few of the shortest eyelets to see which fits best (most likely: 1/18").
Replace default 3/32" rivet setting end of Crafted Findings tool, with 3/32" eyelet flaring set, and use eyelets to secure the flowers.