If your seeking a metalic effect then the shader from Steempipe (WaterShader)
would come in handy i used it , turn of the water effect by setting :
float RippleScale = 0.28;
To
float RippleScale = 0.0;
and:
float cos_x=cos(vecSkill41);
float sin_y = sin(vecSkill41);
To
float cos_x=1;
float sin_y = 1;

didnt try it but i it should wright.
and you can control the opacity by :

PixelShaderConstant[0] = {0.80,0.80,0.92,0.88};

the 0.88 is the alpha value .
all what i mentioned are in the .fx file.

search for it.

& thanks Steempipe for a greate shader.