Methods for selectively staining resin microscope sections.

[vsuiro at botzoo.uct.ac.za]

I am looking for methods to selectively stain thick microscope sections (
embedded in Spurr's resin) for carbohydrates, protein and lipid. I have 
tried using Coomassie Brilliant Blue (protein), Sudan Black (lipids), and 
PAS -periodic acid Schiff's reagent (carbohydrate) but don't know exact 
staining times and methods. Has anyone had experience in this field?
Thanks, reply to HMalan at botzoo.UCT.ac.za