If the hole is fairly small, yes, it can do that. First degrease and scrub the area, then warm the epoxy immediately before you put it on. If the 'hole' is a crack, drill a very small hole at each end of it (1/16 or 3/32 drill bit) this will stop the crack spreading. -
This will NOT be a permanent repair - but now you have some time to find another radiator, possibly from a wreckers yard.
Ford does make many plastic radiator tops, it's possible that epoxy is used in their manufacture.
There are no health risks of epoxy glue,unless you ingest it.
Epoxy itself is glue that will hold to metal.
Yes you can use epoxy glue inside. You can use it anywhere.
epoxy
Epoxy if not much to glue. PL200 in caulk tubes if there is lots to glue.
You can find epoxy glue at most hardware stores and at Walmart, Rona and Home Depot.
Any of the normal epoxy glues would be usable for this.
Epoxy or E6000 would be nest. White glue won't stick to the jewellery.
There are hundreds of different types of glue. Super glue, crazy glue, white glue, yellow glue, fast epoxy, silicone, slow epoxy, ABS pipe glue , just to mention a few.
calcium glue
Epoxy will glue alabaster to alabaster.