I'm curious why you advise using an ablative first???
I am getting ready to apply the Interprotect 2000E. I just ordered a gallon of the Interlux bottomkote epoxy in black for my first coat - of course, it is a hard paint. My plan was to next apply two more coats of the Micron Extra (ablative).
#1 Why would you ever want a hard paint on a boat again after going through all the work to strip it??
#2 because I have been doing it since 1998 when I stripped and barrier coated my old C-30 and it works perfectly with absolutely zero build up. The bottom still looks good ten+ years later and the current owner still uses the same multi-season ablative. No flaking or peeling just smooth..