Just winners get lifetime, but back in 1994, when Dave Scott was making his first comeback, he had to qualify. He had a bad race at Gulf Coast in Florida during the first week of May (some equipment related thing if I recall, and bad positioning causing cramps), and had to wait till later in the season to qualify. That is the year, he finished 2nd to Welch. Here's the full story on the man from xtri.com:
IRONMAN HAWAII 5 OCT-1996 00:53:16 04:49:55 02:45:20 08:28:31 IRONMAN HAWAII 2 OCT-1994 00:51:48 04:39:16 02:53:28 08:24:32 IRONMAN HAWAII 2 OCT-1989 00:51:16 04:37:53 02:41:03 08:10:13 IRONMAN JAPAN 1 JAN-1989 00:48:25 04:27:31 02:45:36 08:01:32 IRONMAN HAWAII 1 OCT-1987 00:50:57 04:53:48 02:49:26 08:34:13 IRONMAN HAWAII 1 OCT-1986 00:50:53 04:48:32 02:49:11 08:28:37 IRONMAN JAPAN 1 JAN-1985 08:39:56 IRONMAN HAWAII 1 OCT-1984 00:50:21 05:10:59 02:53:00 08:54:20 IRONMAN HAWAII 1 OCT-1983 00:50:52 05:10:48 03:04:16 09:05:57 IRONMAN HAWAII 1 OCT-1982 00:50:52 05:10:16 03:07:15 09:08:23 IRONMAN HAWAII 2 FEB-1982 00:58:39 05:17:16 03:21:02 09:36:57 IRONMAN HAWAII 1 OCT-1980 00:51:00 05:03:00 03:30:33 09:24:33
IRONMAN HAWAII 5 OCT-1996 00:53:16 04:49:55 02:45:20 08:28:31 IRONMAN HAWAII 2 OCT-1994 00:51:48 04:39:16 02:53:28 08:24:32 IRONMAN HAWAII 2 OCT-1989 00:51:16 04:37:53 02:41:03 08:10:13 IRONMAN JAPAN 1 JAN-1989 00:48:25 04:27:31 02:45:36 08:01:32 IRONMAN HAWAII 1 OCT-1987 00:50:57 04:53:48 02:49:26 08:34:13 IRONMAN HAWAII 1 OCT-1986 00:50:53 04:48:32 02:49:11 08:28:37 IRONMAN JAPAN 1 JAN-1985 08:39:56 IRONMAN HAWAII 1 OCT-1984 00:50:21 05:10:59 02:53:00 08:54:20 IRONMAN HAWAII 1 OCT-1983 00:50:52 05:10:48 03:04:16 09:05:57 IRONMAN HAWAII 1 OCT-1982 00:50:52 05:10:16 03:07:15 09:08:23 IRONMAN HAWAII 2 FEB-1982 00:58:39 05:17:16 03:21:02 09:36:57 IRONMAN HAWAII 1 OCT-1980 00:51:00 05:03:00 03:30:33 09:24:33