On 20/05/2021 17:52, David wrote:
http://wiki.diyfaq.org.uk/index.php/
File:Broken_side_caravan_front_locker.jpg

Eurgh. I'd *guess* it's some sort of foamed PVC. Floplast 250 sticks
that as well as ABS. You could experiment with some acetone, e.g. nail
varnish remover if you know anyone that uses such stuff, you could get
some on a clean rag and see if it dissolves any of the material when you
rub it on. If it does, solvent cement would be useful (the MEK in it is
rather more aggressive than acetone), but you still have the issue of
what to bond to it (maybe a ring doughnut shaped piece of stuff). More
of the same sort of material, or ABS.

However, is it either of those two plastics is the question!