Plane one side flat with a #5, 6, 7, or 8 jack, fore, or jointer,
cupped or bowed side down, shims underneath to support
the board if necessary. Check for twist with a pair of winding
sticks. Use a scratch gauge to establish the opposite side,
then plane until the iron just splits the scratch lines.
For the edges, plane one edge straight, though not necessarily
square to the adjacent faces. You only need a straight corner
to run against the table saw fence. Rip the opposite side an
eighth or so over, then turn the board and rip the planed, though
not necessarily square edge true.
If the iron was sharp, you're done. The guy with the power
jointer and planer now gets to sand, using 80 or 100 grit
to remove the washboard marks and succeeding grits up
to 220 to remove the scratch marks from the coarser
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