Thanks, although I just got back from the motor factor. I bought some of their Panel Wipe.
When I called them yesterday and asked the guy if their panel wipe was Naptha, he said that he didn't know.
I asked him to read the container to see if it said anything about Naptha. They went away for a minute or so, then came back and said "No, there's nothing written on it".
I decided to get some anyway, so drove over there and picked one up. In reasonably large print on the front, were the words:
"Low boiling point, hydrogen treated naptha"
/MikeB