I was beginning to think that I was the only one understanding "coverage". I know what you mean about the repair ability. If they don't have coverage, trying to match the color can be almost as hard as matching candies.. I remember painting an 86 Corvette with the " Flame Red Metallic", I believe it was code 74. I was using Sherwin Williams at the time and it took 7 coats to get black & white hiding. It liked to never dried, as that base coat was uncatalyzed. You could lay a roll of 3/4" tape on it a month later and it would print.
Bob, you might try the stickers. It would save you the time of making a let down panel and they do the same thing. My PPG rep gave me a roll, they're about an inch square and self sticking. Just put them on a edge you have masked up somewhere.