I think it can be mixed to a grey and printed again. But, I think it will have to be re-activated. Absolutely going to try this before disposing of our bucket.
Coverage through a 150/48 is around 0.04g per sq inch, give or take + you need a minimum 200-300g just to run enough ink in the screen. If you calculate, you get pretty close. I'm keeping a log and noting usage wherever I can to get closer on other mesh counts but have been able to get it fairly close by gut.
This is obvious but, the best trick is to mix you ink and only activate a little at a time.