There are numerous choices for bottom paint.
Whether it is a 21 or a 25 or a 29 makes no difference in the paint type - only in the total cost.
Type of paint (ablative or not, epoxy or not, etc.) is determined by the water and how often the bottom dries out and whether it is on a trailer.
In my case, since the boat spends time on the trailer and in the water I chose (as recommended by an expert) Petit Vivid.
I chose to put on two coats of epoxy based primer before the bottom paint. Ranger says they do not have blister issues and that is vast overkill.. I'm a believer that overkill is better than no kill and regretting it later
(I have not heard a claim of blisters on a tug)
I did all my own taping off (multiple times) and painting over a one week time period.
Saved the labor cost (and having the marina double the price of the paint)
Had the satisfaction.
Had a half dozen offers to paint other boats - told them they could not afford me.
:mrgreen: