After repairing my pattern plane I got this funny little line in the paint. The color is acrylic from hobby lobby and cleared with automotive urethane. It's funny the mark is on the opposite side of the color change. I have several spots that did this but only on the white. Maybe a total of 12 to 14 inches of this phenomenon. The tape is 3M Fineline.
I don't mean to hijack your thread but thought this would be the best place to get an opinion
Ken