Just like blowing bubble gum, but two part liquid plastic that hardens when exposed to the heat of the sun and is shiny. Plus you spin it to make it not roundy but more disky.
Cut in in two and you've got two 600 mile wide space telescope mirrors.
Could also use them for solar concentrators that if properly aimed could torch entire continents.-- doctorremulac3, Feb 01 2023 You were going along so well until the //so scrap that// piece.-- lurch, Feb 01 2023 I'll re-word it. Stand by...-- doctorremulac3, Feb 02 2023 Was it called Spare? I think it's in the bookshops now.-- xenzag, Feb 02 2023 random, halfbakery