I prefer Duct brand chrome duct tape from Wally World cut to square sizes of choice with scissors spritzed with silicon spray for clean cuts.

Far easier than using heating foil tape.

Tilt your target frame a few degrees back for a better reflection from the sky.

And you can easily cut little squares to repair the holes.

https://www.duckbrand.com/products/duck-tape/colors/chrome-188-in-x-10-yd

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]