[EricH]

Seeing as you're asking about polycarbonate glue, I'm assuming that you're asking about the minibot.

So, what can be used to hold magnets to aluminum on the Minibot?

--Polycarbonate glue (anything sold as such, if I'm reading the trend of GDC answers on, "what constitutes an X" questions correctly)
--PVC cement (doubt that would really work, but it might be worth a shot)
--Loctite is not a glue; it's a threadlocker. You could try it... but don't expect success.
--Mechanical fasteners
--Electrical tape is specifically allowed by <R92-W>--no use specified.
--Hook and loop fastener might work, but then you've got two sides of hook and loop between the magnet and the plate.

I'd try the electrical tape. Nothing says it has to be used as an electrical insulator... (until the GDC notices this post, that is).