What would be the best, and safest way, to attach ceiling panels similar to the ones in the attached photo? The panels will either be 1/8" or 1/4" mdf. I don't know the dimensions of the room, yet. I would like something a little more secure than just adhesive, but if we go the adhesive route, it still needs something to hold it in place while the adhesive dries.
From contributor Jo
Loctite makes a tube adhesive with great initial tack and holding strength. Sorry I can't remember the exact name but Home Depot carries it. Also consider using a 23g micro nailer to hold while glue sets.