Thanks for all the responses, I'll see if I can pick up a 'stripe remover'
wheel.
A little more info.  When I bought my '90 Westy seven plus years ago it had
no Westfalia logos on the the top.  It had been repainted by the PPO (and
such a good, professional job that the PO didn't believe it had been
painted) and the logos never replaced.  I ordered a set and put them on.
The front is still fine but the rear has picked up road grime/grease/etc
over the years and turned grungy and black.  So I ordered another set and
I've finally got some good weather to put them on, at least on the rear.
The existing decal is absolutley no clear coated, I put it on myself.
I'll post the results, off to the auto body supply store for their advice
and probably purchase a 'wheel'.