For EM's the Polyurathane is an easy way to go... its linseed based same as the original finish and dries hard enough for a steel ball to roll over it... if its good enough for a floor, its good enough for a PF..
Anyway, found that " wash" video. Paints im using are acrylic lacquers.. they dry super fast.
For enamels then the small HUMBROL tins are magic... its high quality enamel that flows off the brush really nicely, they also come in a huge range and you can mix any colour with them. If right handed and using these.. then start in the top left corner and work your way down... prevents putting the side of your hand in your work and dabbing it all over the PF... LOL - ive ben there!