First, Norm Whittle who lurks and sometimes posts on this forum, is the master at this technique. I'm still trying to get my kote finishes as nice as his almost flawless jobs.
I apply the silkspan with dope, in the normal manner. After it's dry. I use a couple of thinned, (50-50 or less) coats of dope. I don't want the silkspan sealed, just taughtened up a bit.
I make full sized patterrns of my trim design, leaving about a 1/8" overlap, and starting from the back, I'll use normal techniques to first tack, shrink, and iron down the edges. I believe that once tacked into place, it seems to work good using an iron, and a soft cotton glove, to shrink, then wipe with the glove to attach the kote to the silspan while still hot.
Using the silkspan as an under coat allows lots of advantages when applying the trim. Starting from the back, places the laps facing the rear, which helps avoid fuel residue creaping under the edges.
There's an old post I made years ago outlining my build of my Legacy, where in I went into more detail on this method.
It should still be in the archives.
Best wishess, John