If you want to do it the way goldberg suggests(not my choice though) you could easily cover the pieces, and then mask them off with masking tape, so the epoxy that leaks out doesn't ruin the covering job. After the epoxy sets, but is still soft, you can remove the tape, leaving a clean, strong joint. This tecnique allows for a little more generous application of epoxy especially for beginners, and gets rid of the unneeded glue on the outside of the covering.