I have had 2 3rd Gen frames done by a local Gunsmith ..... a 6904 and a 915..... both have seen "moderate use" over about 2 to 2 1/2 years with no wear noted. Both guns were purchased used and had moderate wear and "ring rash" on the frames..... but the slides were closer to 95%......
They have been carried more than shot.......(when I want a gun but don't want to take one of my "better/more expensive" guns).......since the refinish.
IIRC cost was about ....... $75 for each frame...... both are now reverse two tone....... mat "silver" frames w/ blue slides.
While TTSH would disapprove ....... they look good IMHO and I'd rather carry them than a Glock for a beater/ ATV /truck gun!!!!