I like the color of your hull. I tried something like that at first, using spirit line's rare earth pigments, but I have no clue on how to mix colors. I ended up with a couple quarts of purplish, brownish unusable varnish taking up space.
Regarding your perimeter lines, you'll find that as soon as your paracord gets wet, it will stretch like crazy. Nylon absorbs water and softens. I tried nylon paracord on my pygmy and was surprised at how much it sagged when I got it in the water. I switched to poly line and it holds up well. I used this one from Amazon, but you might not want the reflective yarn in it.
https://www.amazon.com/Shine-Line-Reflective-Cord-16/dp/B00TIMTIFE/ref=cm_cr_arp_d_product_top?ie=UTF8