i have a 2008 Lexus GX470 that has a microleak at the top of the drivers side radiator near the top hose--wanting to put some kind of epoxy on it, but not sure what kind of plastic this is--anyone have suggestions? This is a short term fix, will sand, clean with alcohol, then either use fiberglass/epoxy, but just wanted to check to see what people had used that had worked. Thank you in advance.