What is the best way to get a 60 Dixie Chopper out of a typical swimming pool?
aluminum or sheet metalanything else will be very priceyI'm pretty sure that most fixtures contain ones made of polished aluminum.
Tow truck with an extending boom or a crane.
Flattening aluminium foil on carefully, ensuring there are no creases would indeed workMake sure the duller side is the one glued to the dish thoughOther materials would work, but aluminium foil would be the cheapest and easiest to get hold of.
All metals are perfect reflectors of electromagnetic radiationYour suggestion of aluminium foil is a good one but it needs to be perfectly smooth with no wrinkles or creases and I imagine that might be quite difficult to achieve.