Hi Doug!
I'm sorry to hear about the health problems getting in the way of painting for a sim you obviously care about. It's never an easy decision to come to, to quit something that was important to us, for any reason at any age.
I hope it's some comfort to know that your work is out there in other peoples' setups, mine included, plying the virtual airways!
I made a few Guatemalan Cessnas in the One Click repainter that I've also flightplanned, so Guatemala City at least looks like it might be in Guatemala now, with a few local registrations floating about. Just about enough to give some sense of place. Looking at aerial images of airfields it is
evident that aviation is vital to Guatemala, even if some of those airframes are no longer active.