When graduating a spruce top, how much thickness should I reserve for final sanding?
I'm building a Saga kit. I've graduated the maple back and am about to graduate the spruce top, which has about 22 grains/inch. I've measured the thickness on the inside and after my experience graduating the back I know how I'm going to approach it.
The top is nicely rough-sanded. Most of it is fairly smooth but there is a bit of fuzz in a few places. My guess, not being an experienced woodworker, is that I'll need at least 1/100th inch for final sanding, but I might need more and I'd appreciate the voice of experience.
Any advice? Should I consider doing "semi-final" sanding on the top first? My measurement device isn't hard on the top; I'll be setting the finish-side on a wood bump and lowering the gauge with a drill press. So I don't expect to mar it, but I won't want it finish-smooth quite yet. My measurements are good to a little better than 1/100" inch.
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