On the ST you cannot use CREME conditioner, you have to use the CLEAR. I have done dozens and they turn out ok. Creme can cause blooming and ruins it. Also do NOT use saran wrap, that can cause streaks. Simply brush it on with a fine brush and reapply ever 15 min or so while out in the hot sun! 2-3 hours is enough time.
Can you post a link or a picture of the product that you have been using, successfully?
Working on 410s in something I hope to get to, one day. Despite its many flaws, it has a special place in my heart, as my first ever computer peripheral. I'm curious about the rubber wheels. Are you encountering these in the older version or the newer version of the 410?