South/Central American Steam Questions

All of the recent posts on Ecuadorian steam have reminded me of a few questions that I had that I figured somebody here would know about (Thanks to all of those who have been posting first-hand info...its much appreciated and aside from the International Steam Site, there is little out on the web from what I've found.

The G&Q in Ecuador and IRCA and El Salvadorian lines were still running a lot of steam from what I could tell well into the 70's and of course much later. I have an issue of a magazine from 1982 (Steam Quarterly?) that discusses steam around the world, not with me unfortunately. Anyway, it had rosters for the lines in El Salvador and Ecuador that were at least then recent. I recall that most of the El Salvadorian steam was on the scrap line by the 1970's, with only mostly ex-IRCA power still in service, and the G&Q still rostered many engines.

My question is, what were the latest dates of most of the IRCA/El Salvadorian/G&Q steam engines scrapped? (I know they are all very different locales and different histories, but I figured they still all fit under the international banner). I'm guessing that no or few engines have been scrapped since the 1980's, but, I don't know if I have ever seen anything that actually pinpoints dates or timeframes.

Another question, with at least the former IRCA and G&Q attempting over the recent past to attract tourists, are many of the older coaches on the lines actually still used? I ask because I noticed that the G&Q appeared to be building new coaches and was curious if the climate and lack of upkeep on older equipment (Not a jab at employees on these lines, my hats off to them for doing amazing work with very little and with a great deal of ingenuity!) means most of these older cars becomes permanently unserviceable.

Thanks to anyone who can provide insight!