Modelling Props

Some more models I've been working on in my spare time.  I'm decently happy with how they have turned out but I struggled with making the blood splatter textures.  I've added specular maps to the blood areas in an attempt to make the blood look fresh and wet but it still seems to look old and soaked in.  I have no idea how to fix this.  I've had a quick look online but haven't really found any solutions.  Once I start back at uni I will ask around.