My Colonel wants me to glue a piece of laser engraveable aluminum to a piece of 1/4" aluminum. How can I affix this to stay good? We're going to stick it together, waterjet cut it into a state, and engrave on it for an award. I've tried general epoxy and yellow weatherstrip adhesive, aka yellow snot. I'm thinking the next choice is for them to buy me some Gorilla Glue to try?