I am certainly no fan of a single bevel knife unless it is a draw knife. However, if it works for you, give it a go, you can always change it later if you find it to be as unsatisfactory as I do.
As for the handles, Resin is a mighty handy material to work with. The method described is fine for pistol grips as well. As an alternative, you might also try it using different epoxies, varnish, shellac, gorilla glue, etc. Hey, it's all good. (Hint: RTV silicone can make for some great "comfort" grips)
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)