They are usually moulded (molded?) ...
I believe you were correct in the first instance, primarily because if they are "molded" that can usually be cleaned up with a bit of sodium hypochlorite solution, some UV-B/C radiation, or heating above 190° (that's Fahrenheit, or about 85°C). Aw, screw it - 360°K.
Stranger still, if we have a piece which has been "molded" of plastic, clay, or some similar material it probably doesn't include any fungus. Conversely, if we shape a piece of wood into an intricate form, it becomes a "moulding" almost straight away, apparently because wood is special like that. Although that's just like the trim piece on the side of a vehicle, so perhaps it's not so universal after all.
Moreover, the closer we get to Canada, the more confusing it gets, and that's not EVEN interjecting any of that convoluted French stuff from down there in Ontario. They seem to have a language with a distinct colour (color?) which keeps everyone on their toes.
IN any event, I still don't quite get the whole "lorry" thing, especially when a "lorry" probably has a "truck" under the rear end, and then a smaller one inside the back compartment. However, we colonials can be pretty simple at times. The language was already one of the most confusing (if not the most) in existence, and then the Aussies, Kiwis, and Americans got hold of it and flavored (flavoured?) it even further. I'm confident that you thought that was quite enough already, but then just to up the ante, we created "auto-correct" to butcher it completely into sausage.
Haav uh goud dehy...