Robar's Poly-T2 finish is actually more durable and corrosion resistant than NP3 or NP3+
The NP3+ has more lubricity, but it sounds mostly like you're concerned about durability / corrosion resistance. Lubricity is not such a big deal on a revolver anyway.
http://www.robarguns.com/poly_t2.html
The NP3+ has more lubricity, but it sounds mostly like you're concerned about durability / corrosion resistance. Lubricity is not such a big deal on a revolver anyway.
http://www.robarguns.com/poly_t2.html