This is just a quicky post as it's getting late.
During half term I did a class at Nancy's craft shop on making wall plaques from a beer mat, tissue paper, wool/string and punched flowers.
Basically you apply glue to the beer mat and spread out some scrunched napkin tissue over the glue leaving in the wrinkles to give texture.
When dry you add bits of string, wool, thread, punched shapes fine gravel, tiny seed beads. Whatever takes your fancy.
Allow it to dry then paint with black acrylic paint, once dry you lightly brush bronze paint over the raised areas with a stiff brush to highlight the raised areas.