Will MTX brake pads work with resin-only rotors?

Yes. What "resin only" rotors SHOULD say is "do not use with sintered metallic brake pads". This is what it really means. 

Resin-only rotors have typically forgone a heat-treating process to give them the added durability to endure a sintered metallic (metal on metal) brake pad. 

You can use both the Red Label RACE and the Gold Label HD on "resin-only" rotors. To err on the safe side, we suggest sticking to our Red Label RACE product with those rotors.