Headline says "frame," but this will hold true with a clear canopy as well. In fact, if you look really really close, you can see the edge of the clear canopy.
Yes I know, you've seen this done a million times so what's once more.
I view the task a bit differently. I want nothing to sand after I spread the mix, in this case, 5 minute Epoxy and micro-ballons.
The taping is important. Alcohol is used to dip my finger in and smooth the mixture once it's in place. I get it really wet. Pulling the tape is all that is left.
Well, I will take a serious look and see if there's areas that need a tad more. Auto Body putty, limited certainly, can offer a cleaner look when applied over the mix.
Filling primer does the same thing. Be nice to have a "edge" at the frame base. Something to follow for that row of rivets.
The results, with only one pass, is something I can live with.