Painting hull - a few questions for the experts

[Scott1115]

There is a boat I am interested in purchasing. The hull is in good shape but the dark green gelcoat is shot. It's beyond compounding out. I am thinking of repainting the hull flag blue.

1. is there an advantage to Imron vs EasyPoxy vs Brightsides vs Awlgrip?
2. spray vs roll and tip?
3. How do I do it?

Can some one give me "step by step" instructions how to prep hull and paint, etc...or link to a good video (I cannot find one)? Hints would be helpful too.. ie.. start at bow and move to stern, start at top and move towards bottom, etc...

Thank you very much.