Corrugation/undulation in silky oak

[lamanoditrento]

I am nearly ready to finish to start prep'ing for finish on a guitar with northern silky oak back and sides and have found despite using a flat sanding block that I have some corrugation or undulation happening. It is most prominent on the upper bout of the back where the rays are large and near the neck where I have recently been cleaning up the body join.

I assume it is from ray figure being a different hardness to the surrounding grain. I was thinking of using acqua coat and though maybe I should use this soon to harden up the softer grain so I can get a flat surface?

Any one have any tips/ideas on how to deal with this?

[kiwigeo]

Try a scraper....

[rocket]

With a nice sharp scraper, try going at 45-90 degrees across the the low areas to get it flat again the blade will only remove material from the high spots, and then a fine sand. Shouldn't try to fill it all with a filler only pore fill.

Cheers

Rod.

[Hank]

depends on what your finish is and what you will except, your finish sanding so i'm sure it'll be as smooth as.......
I'd roll with it and do a Matt Oil finish and string her up, or use a scraper and then sand out the cross grain marks and end up back to where you are now
Some guitars just don't wanna play along
people love a "bespoke" instrument anyway, call it rustic
Good luck either way, i'm sure it'll sound great