Z16 has given me the best longevity. I think Mothers Preserve and Griot's Vinyl/Leather Dressing probably tied for 2nd-best.
But I learned that a key is to REALLY REALLY clean the rubber parts first. I did this by using Meguiars APC+ 4:1 on the rubber, scrubbed-in with a very soft nylon brush. Then rinse. Then wash again with the Megs, then rinse. When I was totally convinced it was truly, totally clean, then I'd dry. Then come out in an hour and hit with the dressing of choice.
Before hitting on that technique, I would just wash, then dry, then dress. And the dressing wouldn't last more than a few days. For me, the secret has been in really prepping the rubber surface well, then applying a good dressing.
Hope this helps --
Lynn
__________________
"The perfect finish is a process and not a product." -- Jngrbrdman, 12.30.02
'75 Jaguar XJ6C, red
'93 champagne Mercedes-Benz 190E, '70 VW red Kharmann Ghia
Old Post 07-08-2004 12:11 AM