there must be some non smooth areas, burl can be difficult because of the varied surface and densities.
Maybe Use a fine blade scraper prior to applying the oil.
Fo scrapers I like to use those disposable knife blades-
the ones which snap apart and go inside handles.
I don't install them, just use them right out of the package.
You can finish something like an acoustic guitar top or a neck in a matter of minutes-
minimal sanding required.
But they are razor sharp and it takes some technique, wear gloves and be careful.
You don't want too much blood in the finish
