Vinyl convertible top

I have a relative that just bought a new convertible with a black, vinyl top. I was looking at 303, Meguiar's Natural Shine, and Vinylex as a possible protectant. What do you guys reccomend that will be low gloss (natural looking), and not run/streak onto the paint when it rains?
 
I also prefer Ragg Top for vinyl to 303 and other choices. Ragg Top just doesn't seem to wash off as easily as other protectants and water beads nicely on the top after application.
 
on my mx-5 i use:

1) megs #40 (the most powerful)

2) Autoglym Bumper Care (less powerful)

3) Autoglym Vinyl and rubber (least powerful)
 
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