VMS Sand & Ballast Freeze - Big shiny patches?

[LooseSeal]

Hey everyone. Has anyone by chance used VMS Sand and Ballast Freeze, or something similar, and ended up with the results I have below?

 

In hindsight, I should just used PVA, given that the VMS stuff didn't even really hold anything own very well. But these shiny/dark patches are just a nightmare... I've tried painting over them, spraying them with a matt varnish, but I just can't blend them or subdue them.  They're sort of ruining the entire diorama base at this point...

 

[LooseSeal]

I sort of got the last issue dealt with... and now I've shot myself in the foot yet again. Really hoping someone can help with this.

 

As you can see, these white residue marks have appeared on my T-72... They only appeared after I put on the matt coat, and I have no idea how to get rid of them. I had originally (and stupidly) used that VMS Freeze again to try and fix the dirt, then ended up using diluted white glue. I don't know what the matt varnish reacted with.

 

I'm not best/most experienced modeller., but I've put so much effort into this and don't want it to be ruined at this stage. Any ideas on how to remove or just hide these white bits would be so welcome!