I had this problem with Airfix figures...First I wash them in water, then I use Vallejo primer...But the primer is dissolving... I washed second time twice and holded in water with detergent but nothing...Like Airfix figures are to greasy...Then I thought how to fix that, and I rememebered how somewhere I heard some speaking about PVA glue...So I thought PVA glue is called drvofix from word drvo or wood and fix or the wooden glue, It can be apllied by brush not to destroy brush, and so I did... So I use drvofix or white PVA glue for Airfix...And it turned out just fine...
Now if topic is not in right place, admin can move it...