How best to apply the perfect waterline?

So, I am nearing the completion of glassing my hull with fairing and sanding left to be done. I'm going to be applying a coating called Wetlander" to the bottom areas waterline down. The coating is a highly durable slippery compound used primarily on flat bottom boats that frequent the shallows of rivers and swamps. Enabling the watercraft to slide easily over sand and gravel bars. I'm hoping it will enable me to self launch my CS 20MK3 off of beaches etc. My question is what is the

You cannot go wrong if you follow the waterline method that Alan illustrated for putting on the WL and boot top. It is one of the most critical cosmetic components you will add to the boat, get it wrong and the boat will look sad. The most common mistake that I see is that the boot top is measured up the slope of the hull instead of vertical. On boats that have flare forward at the wl or have a counter stern, it causes the boot top to look narrower at the ends giving the boat a frown rather than