Replicating master material Outpost 23

Hi everyone ,

Trying to replicate the master material for outpost 23 in this tutorial : DDO Painter for UE4: Master Materials - YouTube .

Anyone have an idea on how to recreate the Grime and scratches masks in quixel around minute 7:10 up to 8:54 of the tutorial .

Note : I succeeded replicating the whole tutorial except for the grime and scratches masks in quixel ,and i understand the unreal engine side of things .

Thank you.

Best regards,