OK, so today I lightly wiped the body with a damp cloth and hung to dry. When dry I sanded with 240 at a very slight angle to the grain to remove the stray wood fibres. Then a light single coat of filler-primer. When that was dry it was on to the method of Sonic: sanding back with a flat block to highlight and reduce high spots. The small variations left don't look that significant to me and the whole surface feels smooth and ready to go. So next up: more filler-primer, a light sand and then on with the body colour.
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