Spray your foam wreath with a color matching your ornaments before starting. Allow 24 hours between spray painting and attaching the ornaments to ensure the spray paint has dried.
Starting on the inside of the foam wreath, start attaching the ornaments using the epoxy. Allow each "layer" of the ornaments to dry before adding more. Try to create patterns and position the ornaments as closely together as possible to ensure even coverage. You don't want the foam wreath to be peeking through!
Go around the entire wreath, adding more layers, until you reach the outer edge of the wreath. There will be spots of foam wreath peeking through, so add strategically placed ornaments to cover them.