Uses for alloy foil..
Here's a picture that may be useful to foam carvers. It's that alloy foil again. Here it's allowing two pieces of foam to be taped together with tank tape*, while the foam glueing them together cures. No tape will stick to bare foam, but the foil skin is another matter. It'll peel off with the tape later.
Note also the woodworking clamp at the bottom of the picture, they're a bit heavy, can distort the foam structure, but otherwise they're great for holding foam pieces together while curing.
I've already peeled the foil off the rest of these panels, the foam is in tension inside the foil and will take on a curve if one side, or a large part of one side, is peeled off. Can be useful, can be a pain!
* Tank Tape
Originally called "Tape, Black, Waterproof". For covering the rivet tails inside aircraft fuel tank bays in aircraft, to stop them making holes in the bag tanks
Hence 'Tank Tape'
Later used in the music industry, controlled by the Gaffa, due to it's cost and attractive nature.
Hence 'Gaffa tape'
Also inevitably in motor racing (Colin Chapman said it was structural) where it mainly got used for holding ducts into bodywork.
Hence 'Duct Tape' And later, amusingly, 'Duck Tape'