Hello there, I'm a newbie from Brazil!
First, let me say I have some experience with woodworking but I just do small carvings, jewelry, hair forks, etc.
So I also play the baroque recorder and I finally got a custom recorder made of bloodwood. I love its sound but I am not 100% happy with its finishing. This luthier doesn't care much about a perfect finish and I don't want to return the instrument to him.
The turning is perfect and very detailed, but I can see fine lines. I also think this wood deserves a nice polish. It is an outstanding beautiful piece of brosimum rubescens
(conduru, bloodwood, satine). The instrument finish is just mineral oil, but I am considering using a little thinned tung oil on the outside. I can't use anything but oil, mineral or vegetal. Can tung be used over mineral oil?
Anyway, my main question is: how to sand and polish turned wood so the details don't lose their crispness? I'm used to sanding with the grain, but I guess in this case I will have to sand across? I'm thinking about using those very fine grit sponge or abrasive pads. Is this right? Maybe cutting them in very fine stripes...
BTW, I will sand by hand, I don't have a lathe.
Thank you in advance for any ideas.