In a word, yes you should be able to correct or cover it as I've done it numerous times. When I say sand it, I would hope you're using a power sander. I start with 80 or 100 then use 220 to make it smooth enough to where I can get the excess dye off the wood easily without losing my work. It almost comes off like taking An erasure to a dry erase board. (This coming after 3 yrs of re-cutting before I realized "DUH"). As for gluing, I didn't have much luck with it but apparently you are so keep it up dude :-)
Get your facts first, then you can distort them as you please.
There cannot be a crisis next week. My schedule is already full.
Henry A. Kissinger
If you choose to poke at a bee hive, be prepared to get stung.