This is all looking good so far! The wall is lacking the rust layer but that's probably in the works. Is that going to he a master material later or decal? The floor is looking somewhat blurry but that might not matter as much once the water layer is added with the reflect/refract.
OH man, a thousand apologizes I just noticed your message. I was going to add those rust and scuffs that are in the reference image as decals. That way I could have stronger control, resolution flexibility while maintaining a lower vert count. I just noticed the blur you mentioned that might be from the camera I have…