I found that when making the mewtwo model in the last challenge what i saw in zbrush wasn't what i got when i converted polypaint to texture.
eg, I'd paint a colour around the edge of the armour and when i converted the painted area would be placed somewhere else or nowhere at all. It could be that I was doing something wrong but no one corrected me.
I had to go old school and draw in the edges in maya, change the materials on the faces and use the transfer maps