Still playing with the patch. I did the other half of the car and added an oil paint wash. It is *kind of* working. I had to use direct overhead light to get it to show up in the attached pic. You can see it on the layout upon close examination. For the other side of the car I will thicken up the Champ film with several coats of Microscale decal film. I made this one a little too tall anyway. 
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Mike Clements
Wakefield, MA
nyc65.wordpress.com