Sure, X-14 will work great, but in the process of using it you had best
mask off the whole bottom of the Van to the ground with plastic
sheeting, so you have some  semblance of finish left on the painted
surface below.

Have Fun----

Richard Huey writes;

I am the proud new owner of a 1985 van, and would like to clean up the
pop top shell, without harming it. I have heard of a bathtub cleaning
product called X-14 that some have recommended. Is this what I should
use?

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Terry--
74 Campmobile- (Clementine)
85 GL- (Delilah)
86 BMW 325 ES- (Eva)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     "In life, it is much better to want
something you cannot have---

Than to have something you can't get rid of"

(T.K.)