I bought some of the pens to do my tokens, and had the thought to take them to some of my models as well. I've always wanted some custom paintjobs, but with zero actual painting talent, I never bothered until these came along.
I ended up picking up some more colors, as well as the extra-fine markers for most colors to get the narrow spots. Most were then hit with a dark wash to bring the details back out and dirty up the paintjob. Here's most of what I have so far. The YT, other Firespray, and B-wing just have some small highlights so I didn't take pics.
Here's the only shot of my HWK I have, and the WIP Y-Wing, as well as my three X's.
Here's another shot of the X-wings
And both Y-Wings
I also added some gold to one of my Firesprays to differentiate it.