Question about surface hardening if any of revolver frames?

[My Toy]

I purchased a model 66-1 that is in great mechanical shape but has a lot of dings, dents and scratches from years of being carried. I have been removing these imperfections with abrasive paper going through progressively finer grits and finishing with very fine scotch brite. The gun looks almost showroom new.
The question just occurred to me: Am I removing enough of the stainless to compromise the strength of the gun's frame. Some of the scratches/dents are perhaps a couple of thousands of an inch deep. I believe some parts are surface hardened like the sear and hammer notches but is there any surface hardening done on the revolver frame?

 

[kritter]

Nope.... no surface hardening done..
In fact, one of the main gripes about refinished firearms is people go as far as buffing/ removing rollmarks, even the factory does this but will restamp

 

[My Toy]

Thanks for the info Kritter; I didn't think the frames were surface hardened as I had given several other stainless steel Smiths the same polishing treatment and noticed its not that hard to remove some of the surface material to clean up the imperfections. I guess my mind was wandering and I got a panic attack.

 

[WOB]

Even if the frame was surface hardened, removal of a few thou from the surface would not compromise the strength of the frame. S&W revolver frames chambered for standard pistol rounds are not heavily stressed when fired. If they were, they would be made of something besides mild steel and would be heat treated.

WOB