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  1. #16
    Join Date
    Oct 2004
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    I don't know about the technicalities of particle size and rotation and non rotation on sanding, but ...
    Sandpaper traditionally comes in, say, 40, 80, 120, 180, 220, 360, 400 etc etc, and we have been taught to go through those without missing a grit.
    Let's theoretically suppose sandpaper only came in 80, 180, 240, 400 etc etc. I would say that we would have still been taught the same thing over the years.

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  3. #17
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    Jan 2011
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    Canberra
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    I would think that one could start with 220, and eventually get the piece smooth, but would take forever to sand out the tool marks and torn grain.
    This is something I've always thought, but I know that on metal it isn't the case. I've done some work with making jewellery, and if you skip a grade when sanding/polishing sterling silver you won't ever get out the previous marks (or not in the limit of my patience, anyway). Wood is more forgiving, so perhaps it works, but I doubt it would be more time/effort efficient.

    On the main topic, my thought would mainly be on the cross-cuts, particularly if you're a lazy hand sander and don't move the paper around a lot.

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