My sole reason for doing this was not just looks, so here is the rest of the story.
NP3 - THE ADVANTAGES
Very accurate and even coatings on all activated surfaces.
No lubrication is needed on opposing surfaces.
Cleaning is minimal, usually requiring only a soft cloth.
Permits firing for longer periods of time between cleaning, as dirt and powder residue has no wet or oily surface to cling to.
NP3 has a micro hardness of 48-51 Rockwell as plated (nickel matrix).
NP3 is very corrosion resistant, a 1 mil (.001) coating exceeding a 240 hour salt spray test.
NP3 has a high lubricity and low friction co-efficient; therefore, the life expectancy of a firearm will be greatly increased due to reduced friction wear.
The coating is strippable with no effect on the base metal, allowing other coatings to be applied or a new coating of NP3 to be applied, if necessary.
NP3 plated onto stainless steel guns will prevent galling, a problem common with stainless steel.
NP3 is a satin gray, non-reflective color ideal for all firearms.
NP3 can be plated to all internal parts giving a smoothness to the action not found with any other coating.
In cases where the NP3 has been perforated, the corrosion shows no tendency to spread or migrate under the coating.
NP3 is guaranteed against corrosion, peeling or flaking for the lifetime of the firearm.
John