I’m going to start a new thread on this because I don’t want to highjack someone else’s posting. But maybe now that we’re on the subject of jointers and nicked knives I’ll throw this on the fire! Is it the job of a jointer to provide a “finish ready” piece of material or is the jointer main function to provide a piece of lumber that is flat and square?
Same with a planer, its main function is to make the lumber exactly the same thickness throughout the whole length and width of the board.
Now, you take a scraper or a sand paper, their job is to smoothen the lumber to a state whereas you can apply the final finish.
Don’t get me wrong, I hate it when I put in a new set of knives in my planer or jointer and get a nick just as much as everyone else. But, am I going to get all anal about a small little ridge in my lumber and change out the knives right away? No, I’ll grab my cabinet scraper, hand scraper, or the sand-paper and get rid of the ridge on the face of the board. And if it’s on the edge of the board, I’ll move my jointer fence so use a spot on the knives that aren’t nicked.