Picture was hung above a radiator and the wood veneer on the frame has come adrift. Its a moulded frame and I don't feel like trying to make up a shaped former to allow me clamp it while glue is wet.

Tried 3M spray on impact adhesive but it was no use, wouldn't hold. A spray can application would be ideal. Save faffing about with spreading combs or whatever

I need to be able to position it carefully before allowing the impact adhesive grab. Sheet of paper interleaved I suppose would be the way to go. And then it needs to grab evenly on the first pressure.