Vallejo model air Metallic

Hi,

I am using mostly Vallejo colors. All the none metallic colors are easy to spray and look magnificent. Yet when I try to spray the metallic colors it seems to clutter up the airbrush very fast. I tried to use normal Airbrush thinner with the paint, but it doesn't seem like it is solving the issue with the clutter.
I am wondering if I should use isopropanol to thin these metallic paints just like the Vallejo liquid gold.

Or can I basically use the Vallejo liquid gold in the airbrush if thinned enough with isopropanol ?

Any suggestions what to do ?

Thanks !