Using Vallejo Matte Medium

Hello,

I was wondering if anyone has used Vallejo Matte medium to flatten Vallejo acrylics when they are airbrushed. I am assuming you mix it in with Vallejo acrylics before airbrushing.

If you do use it, what ration of medium to paint to you use? Also, how succesful is it at flattening Vallejo acrylic paint?

Thanks for your responses.

Brian

I thin it with tap water and spray it as an overcoat.I use:

Acrylic Resin Matt Varnish 70-520