it'll stay tacky allowing some movement
and then cures like regular glue
i have a set of orig super goose decals on my 81
which i am hoping to save in the same way
the edges are all curled off and a dirts got in there etc
was gonna carefully scapel / scrape the old glue and crud off the back
spray and fix back down
then get some clear film and use that to cover the old decals and really seal them good