Has anyone tried splicing furled leaders to a level silk and then refinishing the whole line, furled leader included (I have read a couple posts on this, but no real results).
I played with this a bit last year. It does work reasonably well, but a proper tapered line is better. The main problem I had was getting a smooth transition from the line to the furled part, and keeping the furled leader held together with the coating. The smooth transition was solved with the right thread count and a small neat join. I think you just have to live with the coating problems.
However, as you have the lines you may as well give it a go, my inclination would be to make two DTs, and perhaps not worry about the splice in the heavier one if one piece is long enough.
I don't see any need to polish it after every use, but then again I cant see polish doing it any harm. If it were mine. I'd give it a quick wipe down when I put it away, and then if I wanted to spruce it up ever now and again. I'd get out the polish.