Emmm - and you posted this thread in the "beginners" forum - yea, sure

I don't understand the "adhesive side up".

I think I heard you say that you laid the violet on the green (green adhesive side down and the violet adhesive side up) so that you could cut get a perfectly matched butt edge. If you did, did you do this before applying the green to the white base? I like the of floating the small trim pieces with liquid (yea, I know, Windex does not activate Ultracote adhesive so we don't need ta go into that issue), butting them against the green, squeegee out the liquid then heating them up. I tried that once but was unsuccessful in removing all of the moisture so when I hit it with real heat bubbles occurred. Gotta admit the the piece that I floated was much bigger than your trim strips.

Thanks for sharing.

Iadded some pearl blue to the otherwise boring top view ...

I'm thinking that some "over-n-under" trim pieces could be treated like you did - resulting in a single "trim"layer. In my case, cutting the blue over the red so that the blue doesn't overlap the red but lies in the red.