Heard about Zaino through the Riviera Owners Association mag(I've got a '65 beauty) and got some to do both the Riv and the Z. As I noted in response to an earlier post regarding color, the "Zaino on my Z" (a sales jingle?) makes the black really deep, and does hold up well over time. My interest is more sun and salt air resistence, as I'm in SoCal on the coast. Go for it. It's easy to apply and they sell a whole line of equally good products for exterior and interiors. (No, I'm not a paid shill.) Shine on!!