Worked for us
We did that to the bottom of our 1995 H37.5 about 4 years ago. After stripping the old paint to bare gelcoat, we did one coat of Pettit Trinidad (red epoxy), followed by one coat of Pettit Ultima SR (blue ablative). That was good enuf for first season. Then we applied one new coat of Ultima SR ablative each season after. Worked well. We dry stored during the winter months. This was all done by a professional boat maintenance company in Annapolis after both the owner of that company and I each had a conversation with the local Pettit rep who advised this approach. Since the method is 4-years old now, it's certainly worth verifying with them that it's still a sound approach. I went to some extent to find a good solution since the previous paints, which we stripped off, had not worked well. This was actually due to poor prep with the very first coat when boat was new. I also wanted to stay in one paint company so that if I again had problems, I could point to that one company. Does Hunter still say 'no sanding' before bottom-painting its new hulls? At the time, when I told the Pettit rep "no sanding" is when he said to apply the first coat as a hard epoxy, before the ablative. The epoxy was more "grippy." it sounds like your approach is good although maybe more coats than you need especially if you will haul/drystore each winter. Personally, if I were doing this again, I would still stay with one paint company in case of any incompatibility. The only downside: expensive.
