I got some of my leather luster boot shine stuff on one of my projects but didn't realize it till it was dry. I thought it was a ruined project but no, when I tried to paint over it and everything was dry, it left a raised up look like many layers of paint have been added ( much like most military vehicles) so anyway
I already had my metalic / rust coat underneath . when I tried to peel the stuff off it worked very well to give a chipped look as well.
I really don't know what it will do for a mass model so looks like it's time to experiment?