I am planning to build light reflectors to hang over my aquariums. I plan to bend sheet metal into the proper (sort of) parabolic shape and then glue mirrored mylar to the surface. I don't know what kind of adhesive to use.
The requirements should probably include water resistance, because there is a fair bit of humidity above an aquarium (even with a glass top). Of course, it must adhere to metal and to mylar. I also think that low viscosity is important. The mylar should be as wrinkle free as possible for best light reflection and it seems to me that a low viscosity glue will lend itself to smoothing out the mylar better than something that is thicker.
I'm not sure if a long bonding time is important or not. It seems like a long bonding time would be better so I can smooth things out, but a shorter time would work if I develop a method to apply the mylar in one swoop.
water resistant adheres to metal and mylar low viscosity (maybe) longish bonding time
Alternatively, if someone would care to explain how one makes a reflector out of polished aluminum and where one gets polished aluminum or how one polishes aluminum (I really know nothing about polished aluminum except that it is shiny), then I might go that route instead.
Any helpful or humorous suggestions are greatly appreciated.