I also agree with that, you will get problems further down the line if you try and paint over that paint after flatting it. my opinionPersonally Id stop cocking about trying to make the best out of a bad job and start again, doing it properly.
Im worried you will manage to get it into paint only to have problems later down the line.
Personal opinion.
I can see what you mean about the possiblity of having problems further down the line, and that was our worries. In the end we decided to sand all the primer off and start again.
That would be the ideal situation, but it's alot of work to remove the primer when chances are, if you flat it down and apply a coat of sealer or barcoat it'll be fine.
We thought that it would be the ideal situation to sand it all off. Rather than risk it, we spent a good half a day sanding it back down.
At the moment, just need to 'newspaper the mini up' and it's ready for the primer to be applied which will be tomorrows job.
james