What you describe is in some circles described as a torture board, very effective for fairing the surface.More of a curiosity question. I am in the middle of painting my boat. Overall I’m happy. I do have some brush strokes to form out but it’s better than it was bought so I’m fine with that.
my question is this. In the past I sanded brush strokes out with 320 grit on an orbital sander. Last weekend I saw a guy doing the exact same job but by hand. I didn’t want to bother him while working but we ran into each other snd were chatting and he uses a big maybe 2 foot bar and sand paper to do the side of his hull between coats. Said it works best for sanding even.
I’m curious what everyone’s opinion is or what you do sanding beteeen costs. Sand by hand or with a tool? I have a lot more coats to go so I’m interested to hear any tips on this part.