The scene file can be downloaded here.

Alembic geo visible in the Alembic

 

Hide the Anvil (Set Parameter)

/obj/alembic1/*/alembic1_3

 

Assign Blue Shader to Anvil (Set Parameter)

/obj/alembic1/*/alembic1_3

 

Merge

Assign Matte to Apron (Set Parameter)

/obj/alembic1/*/alembic1_1

 

 

Final Operators -> Arnold ROP