If I tried this, I would be mostly playing.
I was thinking of making a small sheet of aluminum from the can, polishing it, and shaping it into a reflector (probably with the help of a form). The reflector could then go into a diy pendent/hood. All in all, if I value my time at all, will just order a ahs reflector first - but if I get bored and have the time in the meanwhile I might try it for grins.
Pretty much have seen only good reviews on the ahs reflector, and am under the opinion it is polished aluminum.
58 gallon oceanic, Kessel 360 tun sun, pressurized co2, eheim pimp #179 - 2217 and diffuser