All the release ideas are excellent
It is Mayhem after all!
Suggestion for glue: use diluted emulsion paint - its an acrylic and when hard is waterproof thereafter
and with a gold-coloured* coat
*my style advisor buys matchpots - I get to use them up
Came out very well, but I confess that I used a layer of epoxy/finishing cloth for the final (outside) layer
In fact you can use any glue, so long as you waterproof well enough