I do remember seeing a ADM GTR for sale that had been retrimmed in a similar material, I am pretty sure it was this one.
Everything else looks pretty genuine (speedo, indicators,). If the guy can confirm there's the Altezza cooler underneath then chances are i propably is ADM. But yeah something up with engine bay colour.
Shannons have a good lay-up cover insurance policy which covers theft and fire. Thats what I have on mine till I get around to re-registering it. Let it lapse when daughter was born, now I just change oil and clean it.lol.