Hi,
I haven’t heard of this film, but can offer some advice on how to handle the customer.
This reminds me of when I would be asked about using reflectives and chrome on vehicles – I would go out of my way to explain how they erode (especially when on a bonnet), much more quickly than standard cast films.
Customers can be pretty insistent, so after explaining that we can’t guarantee the lifespan of these films, I’d add a note into the quote about it and the customer would have to acknowledge this on approval – essentially leaving it up to the customer to take responsibility for the life of the vinyl.
If he wants to import the vinyl himself, I’d say let him do it (and tell him he will save a few bucks by bringing it in, so get a little extra for just-in-case!). So long as he understands that it is not one of YOUR normal stock lines and that if it doesn’t work, the responsibility lies with him (there’s probably a nicer way to say that, of course!). If this is an Avery super film, you’ll probably find it a lot easier to apply than a laminated cast anyway.
He sounds pretty keen to help you get the exact colour he wants, so if this were my customer, I’d give it a go.