Waterline on a 20' and paint questions

[CaptainHoppy]

Yamm,
I have a 1973 SF20 with bottom paint and when fully loaded my bottom paint is approximately 1 1/2" above the waterline on the entire boat. From my experience, I would not put imron below the waterline. It will blister and will not be a pretty site. I put 2 coats of barrier coat before putting 2 coats of Petit hard coat.

I will take some measurements on my hull that may help you with establishing your waterline. Hopefully it will help when you lay it out with tape.

If you need pictures let me know.
-MH-