Ok so the dreaded what to do with the Ensolite seams in our old eggs appears to be a touchy subject for many who have tried to clean em up. Well i may have the answer for you.......
Perma Stik - Anti Skid Vinyl Tape
Available at RONA (I think the roll was about $30)
http://www.wjdennis-rcr.com/Portals/...s/Antiskid.pdf
The white 1" textured tape normally used for grip in hot tubs or showers is the stuff I used.
It has an adhesive waterproof backing and is quite pliable. I still decided to use a
light spray of 3m Super 90 on the pieces just be fore installing them, then lightly waving a heat gun over them as they were installed just to make sure It conformed to the curves and stuck well.
Then I repainted the whole interior with White High Gloss Urethane Marine Enamel which has turned out beautiful.
Keep in mind a real good clean first is gonna help bigtime, plus I think the heat gun was key to making the tape "stretch" into the curves really well.
Good Luck.