Bleaching Hard Maple

Should be an easy solution to this since it's a common a problem but damned if I can find the answer.
Building a table top out of hard maple for a sister-in-law and I've just finished milling the rough sawn stock to near finished size. What I've found is some mineral streaking and small stained areas that I would like to bleach out so they'll blend better when the stain or dye is applied.
What have you found that works reasonably well ?
Thank you,
Bob S.

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