it looks like you're coil potting your encalmo's. i like doing it that way too but i've noticed that any unevenness in the thickness of the coil will shift the encalmo lines. you also see the areas where the cadmiums got really hot and shifted color. these issues can be avoided (if you desire) by making a series of different colored sections and marrying them with welds. takes a bit longer unless you do a bunch at a time but it's cleaner looking imo.