3 hands vs donk

[Dalek]

Value bet hand 1

Fold turn or call river in hand 2. He's more likely to have an 8/9 and think its good than have a 4. A flush is possible but not likely and you can't give him credit for it after calling the turn. As played call the river.

Hand 3 is a check-raise all-in on the turn to defend against a flush draw. As played, easy call on the river as the 5 is very unlikely to have helped him.