Hello martin.

No, you must not use liquid metal with an aluminium radiator! Chemical reaction. Here is a link, then you can see what happens:

https://youtu.be/5bIsYv3P1i...

I can't tell you anything about the disposal of liquid metal. I haven't even thought about it myself.

Das Datenblatt sagt: "Intended use or recycling is to be preferred to the disposal. The product should be disposed according to the locally valid laws
on waste disposal and (the competent authorities are responsible to give the necessary information). " Frag also einfach bei deiner Gemeinde nach ;)