hola!!
Watermann's advice is usually spot on, (even though it's sometimes not what you want to hear).
We sanded ours down pretty aggressively. Total paint strip on transom metal, but only a heavy sand on the rest of the boat. For now, it appears both are holding up equally well, but only time will tell on longevity of paint adhering.
Also!!!! MAKE SURE YOU AVOID WALKING ON THE BARE HULL!!! We *think* we developed some cracks in the hull towards the bow by walking on the bare interior hull too much. Keep a piece of decking that you can shift around to walk on
Just our 2cents... I think I've seen others say the same thing. The boats are fragile without transom + decking.