the mi-tientes does come in 25 or so colors. For 2 color models my preference is to use acrylic paint and acrylic ink either before or after folding rather than back coating a sheet with tissue paper. So the pegasus is white paper with a coat of gold paint on the textured side. You do need to give the paper plenty of time to cure before wet folding or the acrylic can become tacky to the touch. The mi-tientes looks great with metallic paints but i do use a fair bit of star dream for metallic models as well.
Plenty of people have good tips and techniques on using acrylic (lafosse, webber, mabona, and others). The key for me is to find workable color combinations of base paper and paint so the raw edges and rough spots are not noticeable or are noticeable in a way you like. Black paper with red paint looks killer and is highly recommended for models like Stephan webbers bull. The little devil pictured above is black mi-tientes painted red after the fold was complete (sadly there is no real color change on the horns or eyes).
FYI, sadly no diagrams for the little piggy because his very close cousin was published in Creased issue 7 (flying pig). Would not be difficult for a novice folder to make the conversion though.
http://www.creased.com/gallery_issue7.html
