Jeff,
I backed with a mossy oak, linen, and TBIII. it worked fine, but you have to be very careful about sizing first and saturating the cloth so that there are no dry spots and keep working to keep out the air bubbles.
oh and to answer the original posted question-use TBIII over CA, only use the CA to fix air bubbles (make a small slit in the bubble with a razor knife, then fill with CA, compress smooth and let dry), don't do the whole thing in CA. It may look good on the test site, but it won't when you bend the limb.