i had this "garden trellis" in my garden for several years. and yes, the "objects" were attached (i have a strange garden!). when i felt the trellis was sufficiently "weathered" i brought it in and "made art"! i usually put objects in my garden to weather them. i like the "look".
of course the "back" painting was not weathered in my garden. i painted it and attached the trellis to it.