You need texture with body and materials for armor.
Armor must be fitted to body.
Select all, check texture and delete all ghost UVmapin.
Select all and separate parts.
Select area and choose UVmap
for curved areas use unfolding
Fit area to material.
Move parts if it needs.
Select shiny areas and dark one separately
to get something like shadows
and choose shadowed part on texture
for fitting details you can move point by point
parts as horns texture in 3 parts, left, right and bottom (use very small area. You will newer see this part.)
for better fit use same area for both. You can also move point for detailed texture fitting. (this one is not such)
Some parts are just mirrored. After textured, you can duplicate it and flip to right direction.
this part will have more shadows than others.
At the end you will move parts to proper positions. you can combine all model and export it as .obj.
If everyhing is OK, model will nice fit body when I will import it in milkshape.
Now it is prepared for rigging.