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Linseed oil is great stuff to a point.
If you use artist grade Linseed I think you get a better result because it is clear,not yellow.I use winsor and Newton.
Another trick is to cut it with...

Look into the long forgotten ways of doing french polishing,Pumice and oil,rottenstone and oil.You will get a glow on hardwoods you cannot duplicate with any plastic finish.

145445Thats the beauty of hardwoods,They truley look better highley polished and protected with wax.

Blackwood is very hard on tools as it has high silica content.all I use is carbide anymore,One brush, the tool gets sharpend,after Blackwood.

Thats very nice indeed,blackwood is a joy to work with for sure.