Hello. I did some Google searching for the re-coloring tutorial by Rob Carleen that was listed in the earlier posts of this thread. I was able to find it via the Wayback Machine (
Internet Archive: Digital Library of Free & Borrowable Books, Movies, Music & Wayback Machine) using this link:
dgapapermodels.com/Instructions/Recoloring Card Models.pdf
Just copy and past that link into the Wayback Machine site, and you should be able to retrieve the PDF file.
I hope this is still useful. Take care.