For a snub J frame or carry wheel gun, I'd opt for the Bearcoat or Robar treatment. Bearcoat runs about $249.00 total(s-h included) & is good for lifetime service plan. Shop times are approx 10 days too.
If you want to protect your snub or plan to be in rough weather(rain snow dust) Bearcoat may help. NP3+ is great too but costs a lot!