I,m not sure what you want to know about the paint job, you should paint the color you like not what some one else likes.
I will weigh in on the gas vs diesel issue though.
Repowering a boat is never easy and usually a very costly deal. You will most likely have to modify the engin beds ands mounts possibly your shaft or engine box. then you get into running fuel return lines, new guages, and it just goes on and on. It may end up costing more than the boat. Diesle is definatley a safer fuel and preferable to gas but not to the point where I would spend the dough unless I knew I was keeping the boat for the rest of my days. Personally I would just rebuild It If possible.
s\v Soul Searcher
All boats are sinking it's just a matter of how fast.