Gents,
My restorer, a well-experienced body man and talented automotive painter, was aware of and had used this Mercedes mask in the past to paint wheel covers. He was not impressed with the results. Perhaps they are good enough for the factory or for general use but the perfectionist in him (after all, he was doing restorations) didn't like the results.
He used a liquid "paint on" masking material instead. I think this is a fairly common product at autobody supply shops. I will contact him and ask him the specific product he used and repost if he gets back with me.
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored