Will it work?

[Jamesp]

There were a couple of problems. The silicone stuck to the tape despite the "silicone release agent" I used. It would tear before releasing from the tape. I think I could overcome that, but the real problem was the final finish of the silicone would be uneven and stick out like a sore thumb. It's OK to have that unevenness in a bathtub install, but sitting between the smooth shiny fender and light it was clear it would be very noticeable.