Hi Sean:
I never used Kevlar, I think that not is necesary, I use epoxi and fiber glass and add color to the epoxi (yellow) the tanks look prettys, I think. I make the master in blue foam and them I cut it in the middle, them I cover the master with brown tape and cover with 4 layers of fiber with epoxi with a few of micromix for get a epoxi more heavy. Them I remove the fiber withow brake the master.
You can see the tanks of my Bandit (withow color) and Bobcat (with color)
Here you see how I cover the foam with fiber with yello color:
https://picasaweb.google.com/1085696...63454551619538
BR from Spain.
Carlos Márquez.
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http://cmjets.blogspot.com.es/