FINISHED!!!
After having airbrushed Pébéo gloss varnish, I have used Tamiye paneliner.
I've constated a bad reaction between Pébéo acrylic varnish and the paneliner; the varnish tends to be removed if you use q-tip to eliminate the excess of paneliner...
...And of course if you use white spirit to do that, white spirit will attack the Xtreme Metal!
Anyway, I was extremely careful and there wasn't big problem...