Control spinner reflection

[xoa]

Is it possible to control the spinner reflection of the car without brighten up the Alpha Channel of the used texture?
The problem is the reflection of the car is to strong. I don't want remove the reflection, just want to make is very "decent".

 

[redapg]

If the Alpha channel is used for the reflection, i would say no, as long as you don't create new *.gmt's which include the wccarbody-material, change the material-settings into e.g. only cube reflection and a low blend-setting and let them show up only at spinner.