After leaving overnight for the Painter to set, a solid coat of matt varnish and then leave them for a few hours more. I found it useful to do it in stages, leaving the figures overnight after finishing the painting as the paint has to be completely dry before coating with Army Painter otherwise you risk crackling ( a nice effect interior designers strive for but a disaster for miniature soldier painters!) The completely dried and varnished figures are then removed from the painting sticks, the figure bases cleaned up and then glued to the stand bases, all of which have magnetic sheeting cut to fit on the bottom (gives the figures a smidgeon more 'heft' too!)
After you've given them a final flocking (sounds kinda wrong but looks alright!) wipe off the excess on the edges finish sealing them with paint - I use a flat black acrylic as it defines and lifts the base.