Not sure, I don't use oil base stains. But I would experiment with a leftover piece instead of my finished project. Another coat with no sanding might work, but like I said, I'd be trying with leftover wood.
Are you sure that it is blotchiness from the stain and not caused by the light reflecting properties of the Mahogany? I have seen some Mahogany that had such a difference in reflection it was like the difference between black and white. That is one reason I like Mahogany.After sealing the Mahogany Humidor I am building I applied Zar oil based stain as instructed only to have the top surface dry with blotches. The sides are fine!
I have sanded it with 120 grit and reapplied the stain with no change. What can I do to correct? Doc