Splash is an accepted variety in Silkies, therefore, showable. But good catch on the leakage, if there is any yellowing it is a disqualification.
No, but if it is just a county fair it could be worth showing him for the experience.
I wouldn’t recommend showing him. He seems unbalanced (much more neck than tail) and much of his feathering on his feet and tail isn’t silkied.
He wouldn’t be disqualified, but he isn’t good.